diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index a76fe69..0213a7f 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -61,10 +61,10 @@ jobs:
         uses: taiki-e/install-action@cargo-hack
 
       - name: Build crate
-        run: cargo hack --feature-powerset build --all-targets --verbose
+        run: cargo hack --workspace --feature-powerset build --all-targets --verbose
 
       - name: Test crate
-        run: cargo hack --feature-powerset test --verbose
+        run: cargo hack --workspace --feature-powerset test --verbose
 
   minimal-versions:
     runs-on: ubuntu-latest
@@ -91,10 +91,10 @@ jobs:
           tool: cargo-hack,cargo-minimal-versions
 
       - name: Build crate
-        run: cargo minimal-versions --direct --feature-powerset build --all-targets --verbose
+        run: cargo minimal-versions --direct --workspace --feature-powerset build --all-targets --verbose
 
       - name: Test crate
-        run: cargo minimal-versions --direct --feature-powerset test --verbose
+        run: cargo minimal-versions --direct --workspace --feature-powerset test --verbose
 
   coverage:
     # This is separate from the main tests because cargo-llvm-cov doesn't run
@@ -120,7 +120,7 @@ jobs:
           tool: cargo-llvm-cov
 
       - name: Test with coverage
-        run: cargo llvm-cov --all-features --lcov --output-path lcov.info
+        run: cargo llvm-cov --workspace --all-features --lcov --output-path lcov.info
 
       - name: Upload coverage to Codecov
         uses: codecov/codecov-action@v5
@@ -149,13 +149,13 @@ jobs:
         uses: taiki-e/install-action@cargo-hack
 
       - name: Check code (no tests)
-        run: cargo hack --feature-powerset clippy -- -Dwarnings
+        run: cargo hack --workspace --feature-powerset clippy -- -Dwarnings
 
       - name: Check code (including tests)
-        run: cargo hack --feature-powerset clippy --all-targets -- -Dwarnings
+        run: cargo hack --workspace --feature-powerset clippy --all-targets -- -Dwarnings
 
       - name: Check formatting
-        run: cargo fmt --check
+        run: cargo fmt --all --check
 
   docs:
     runs-on: ubuntu-latest
@@ -173,7 +173,7 @@ jobs:
         uses: Swatinem/rust-cache@v2
 
       - name: Check docs
-        run: cargo doc --no-deps --all-features
+        run: cargo doc --workspace --no-deps --all-features
         env:
           RUSTDOCFLAGS: -Dwarnings
 
diff --git a/Cargo.toml b/Cargo.toml
index 8453e64..c4018be 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,39 +1,31 @@
-[package]
-name = "rswodlib"
-version = "0.1.0"
+[workspace]
+members = ["crates/*"]
+resolver = "2"
+
+[workspace.package]
 edition = "2021"
-description = "Assorted Rust utility functions"
 authors = ["John Thorvald Wodder II <rswodlib@varonathe.org>"]
 repository = "https://github.com/jwodder/rswodlib"
 license = "MIT"
-exclude = ["/.*"]
-publish = false
+
+[package]
+name = "rswodlib"
+edition.workspace = true
+description = "Assorted Rust utility functions"
+authors.workspace = true
+repository.workspace = true
+license.workspace = true
 
 [dependencies]
 automod = "1.0.8"
-bstr = { version = "1.4.0", default-features = false, features = ["std"] }
-futures-util = { version = "0.3.29", default-features = false, features = ["std"], optional = true }
-log = "0.4.20"
-num-traits = "0.2.15"
-pin-project-lite = { version = "0.2.11", optional = true }
-shell-words = "1.1.0"
-thiserror = "2.0.0"
-tokio = { version = "1.29.0", features = ["sync", "time"], optional = true }
-tokio-util = { version = "0.7.10", features = ["rt"], optional = true }
 
 [dev-dependencies]
-assert_fs = "1.0.13"
-predicates = "3.0.3"
 rstest = { version = "0.23.0", default-features = false }
-tokio = { version = "1.29.0", features = ["io-util", "macros", "rt"] }
-
-[build-dependencies]
-rustc_version = "0.4.1"
 
-[features]
-tokio = ["dep:futures-util", "dep:pin-project-lite", "dep:tokio", "dep:tokio-util"]
+[lints]
+workspace = true
 
-[lints.rust]
+[workspace.lints.rust]
 # Lint groups:
 future_incompatible = { level = "deny", priority = -1 }
 refining_impl_trait = { level = "deny", priority = -1 }
@@ -112,7 +104,7 @@ unused_comparisons = "deny"
 useless_ptr_null_checks = "deny"
 while_true = "deny"
 
-[lints.rustdoc]
+[workspace.lints.rustdoc]
 bare_urls = "deny"
 broken_intra_doc_links = "deny"
 invalid_codeblock_attributes = "deny"
@@ -122,7 +114,7 @@ private_intra_doc_links = "deny"
 redundant_explicit_links = "deny"
 unescaped_backticks = "deny"
 
-[lints.clippy]
+[workspace.lints.clippy]
 # Deny all warn-by-default lints:
 all = { level = "deny", priority = -1 }
 
diff --git a/README.md b/README.md
index d26a3e6..6da4c5b 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,16 @@
 [![codecov.io](https://codecov.io/gh/jwodder/rswodlib/branch/master/graph/badge.svg)](https://codecov.io/gh/jwodder/rswodlib)
 [![MIT License](https://img.shields.io/github/license/jwodder/rswodlib.svg)](https://opensource.org/licenses/MIT)
 
-`rswodlib` is a personal Rust library containing various useful (and often
-reused) functions & functionalities that aren't quite worthy of packages of
-their own.  It is not meant to be installed; instead, if you see anything you
-like in it, you are encouraged to copy & paste, subject to the MIT license.
+`rswodlib` is a personal collection of [Rust](https://www.rust-lang.org)
+functions & functionalities that, though useful and often reused, aren't quite
+worthy of published packages of their own.  It is not meant to be installed;
+instead, if you see anything you like in it, you are encouraged to copy &
+paste, subject to the MIT license.
+
+The project is laid out as a [workspace][] in which the root package contains
+only code with no (non-test) dependencies beyond `std` (and [`automod`][], for
+convenience) while the other packages (all located in `crates/`) require one or
+more third-party dependencies each.
+
+[workspace]: https://doc.rust-lang.org/cargo/reference/workspaces.html
+[`automod`]: https://crates.io/crates/automod
diff --git a/crates/generic-num/Cargo.toml b/crates/generic-num/Cargo.toml
new file mode 100644
index 0000000..b1821db
--- /dev/null
+++ b/crates/generic-num/Cargo.toml
@@ -0,0 +1,16 @@
+[package]
+name = "rswodlib-generic-num"
+edition.workspace = true
+#description = ...
+authors.workspace = true
+repository.workspace = true
+license.workspace = true
+
+[dependencies]
+num-traits = "0.2.15"
+
+[dev-dependencies]
+rstest = { version = "0.23.0", default-features = false }
+
+[lints]
+workspace = true
diff --git a/src/math/gcd.rs b/crates/generic-num/src/gcd.rs
similarity index 100%
rename from src/math/gcd.rs
rename to crates/generic-num/src/gcd.rs
diff --git a/crates/generic-num/src/lib.rs b/crates/generic-num/src/lib.rs
new file mode 100644
index 0000000..c4de57e
--- /dev/null
+++ b/crates/generic-num/src/lib.rs
@@ -0,0 +1,4 @@
+mod gcd;
+mod modinverse;
+pub use crate::gcd::*;
+pub use crate::modinverse::*;
diff --git a/src/math/modinverse.rs b/crates/generic-num/src/modinverse.rs
similarity index 100%
rename from src/math/modinverse.rs
rename to crates/generic-num/src/modinverse.rs
diff --git a/crates/loggedcmd/Cargo.toml b/crates/loggedcmd/Cargo.toml
new file mode 100644
index 0000000..0c85b2e
--- /dev/null
+++ b/crates/loggedcmd/Cargo.toml
@@ -0,0 +1,15 @@
+[package]
+name = "rswodlib-loggedcmd"
+edition.workspace = true
+#description = ...
+authors.workspace = true
+repository.workspace = true
+license.workspace = true
+
+[dependencies]
+log = "0.4.20"
+shell-words = "1.1.0"
+thiserror = "2.0.0"
+
+[lints]
+workspace = true
diff --git a/src/cmd/loggedcmd.rs b/crates/loggedcmd/src/lib.rs
similarity index 100%
rename from src/cmd/loggedcmd.rs
rename to crates/loggedcmd/src/lib.rs
diff --git a/crates/partition/Cargo.toml b/crates/partition/Cargo.toml
new file mode 100644
index 0000000..91b4121
--- /dev/null
+++ b/crates/partition/Cargo.toml
@@ -0,0 +1,15 @@
+[package]
+name = "rswodlib-partition"
+edition.workspace = true
+#description = ...
+authors.workspace = true
+repository.workspace = true
+license.workspace = true
+
+[dependencies]
+
+[build-dependencies]
+rustc_version = "0.4.1"
+
+[lints]
+workspace = true
diff --git a/crates/partition/LICENSE b/crates/partition/LICENSE
new file mode 120000
index 0000000..30cff74
--- /dev/null
+++ b/crates/partition/LICENSE
@@ -0,0 +1 @@
+../../LICENSE
\ No newline at end of file
diff --git a/build.rs b/crates/partition/build.rs
similarity index 100%
rename from build.rs
rename to crates/partition/build.rs
diff --git a/src/strings/partition.rs b/crates/partition/src/lib.rs
similarity index 95%
rename from src/strings/partition.rs
rename to crates/partition/src/lib.rs
index 43eb147..5bbdd91 100644
--- a/src/strings/partition.rs
+++ b/crates/partition/src/lib.rs
@@ -1,4 +1,5 @@
 #![cfg(nightly)]
+#![feature(pattern)]
 // Requires the "pattern" feature on nightly
 // - `#![feature(pattern)]` must be enabled in the root module
 // - rswodlib is configured to only make use of nightly features when actually
@@ -13,7 +14,7 @@ use std::str::pattern::Pattern;
 /// # Example
 ///
 /// ```
-/// # use rswodlib::strings::partition::partition;
+/// # use rswodlib_partition::partition;
 /// assert_eq!(partition("abc.123-xyz", ['-', '.']), Some(("abc", ".", "123-xyz")));
 /// assert_eq!(partition("abc_123_xyz", ['-', '.']), None);
 /// ```
diff --git a/crates/runcmd/Cargo.toml b/crates/runcmd/Cargo.toml
new file mode 100644
index 0000000..74176a0
--- /dev/null
+++ b/crates/runcmd/Cargo.toml
@@ -0,0 +1,19 @@
+[package]
+name = "rswodlib-runcmd"
+edition.workspace = true
+#description = ...
+authors.workspace = true
+repository.workspace = true
+license.workspace = true
+
+[dependencies]
+bstr = { version = "1.4.0", default-features = false, features = ["std"] }
+rswodlib = { path = "../.." }
+thiserror = "2.0.0"
+
+[dev-dependencies]
+assert_fs = "1.0.13"
+predicates = "3.0.3"
+
+[lints]
+workspace = true
diff --git a/src/cmd/runcmd.rs b/crates/runcmd/src/lib.rs
similarity index 97%
rename from src/cmd/runcmd.rs
rename to crates/runcmd/src/lib.rs
index e283b3f..aba03f4 100644
--- a/src/cmd/runcmd.rs
+++ b/crates/runcmd/src/lib.rs
@@ -1,5 +1,5 @@
-use crate::strings::trim_string::trim_string;
 use bstr::ByteVec; // into_string_lossy()
+use rswodlib::strings::trim_string::trim_string;
 use std::ffi::OsStr;
 use std::process::{Command, ExitStatus, Stdio};
 use std::str;
@@ -112,8 +112,7 @@ mod tests {
     #[cfg(unix)]
     mod unix {
         use super::*;
-        use assert_fs::prelude::*;
-        use assert_fs::NamedTempFile;
+        use assert_fs::{prelude::*, NamedTempFile};
         use predicates::prelude::*;
 
         #[test]
diff --git a/crates/tokio-btn/Cargo.toml b/crates/tokio-btn/Cargo.toml
new file mode 100644
index 0000000..4dfac2f
--- /dev/null
+++ b/crates/tokio-btn/Cargo.toml
@@ -0,0 +1,15 @@
+[package]
+name = "rswodlib-tokio-btn"
+edition.workspace = true
+#description = ...
+authors.workspace = true
+repository.workspace = true
+license.workspace = true
+
+[dependencies]
+futures-util = { version = "0.3.29", default-features = false, features = ["std"] }
+tokio = { version = "1.29.0", features = ["sync"] }
+tokio-util = { version = "0.7.10", features = ["rt"] }
+
+[lints]
+workspace = true
diff --git a/src/tokio/btn.rs b/crates/tokio-btn/src/lib.rs
similarity index 100%
rename from src/tokio/btn.rs
rename to crates/tokio-btn/src/lib.rs
diff --git a/crates/tokio-buffered-tasks/Cargo.toml b/crates/tokio-buffered-tasks/Cargo.toml
new file mode 100644
index 0000000..26fdbb4
--- /dev/null
+++ b/crates/tokio-buffered-tasks/Cargo.toml
@@ -0,0 +1,14 @@
+[package]
+name = "rswodlib-tokio-buffered-tasks"
+edition.workspace = true
+#description = ...
+authors.workspace = true
+repository.workspace = true
+license.workspace = true
+
+[dependencies]
+futures-util = { version = "0.3.29", default-features = false, features = ["std"] }
+tokio = { version = "1.29.0", features = ["rt", "sync"] }
+
+[lints]
+workspace = true
diff --git a/src/tokio/buffered_tasks.rs b/crates/tokio-buffered-tasks/src/lib.rs
similarity index 100%
rename from src/tokio/buffered_tasks.rs
rename to crates/tokio-buffered-tasks/src/lib.rs
diff --git a/crates/tokio-lsg/Cargo.toml b/crates/tokio-lsg/Cargo.toml
new file mode 100644
index 0000000..61f46be
--- /dev/null
+++ b/crates/tokio-lsg/Cargo.toml
@@ -0,0 +1,15 @@
+[package]
+name = "rswodlib-tokio-lsg"
+edition.workspace = true
+#description = ...
+authors.workspace = true
+repository.workspace = true
+license.workspace = true
+
+[dependencies]
+futures-util = { version = "0.3.29", default-features = false, features = ["std"] }
+tokio = { version = "1.29.0", features = ["sync"] }
+tokio-util = { version = "0.7.10", features = ["rt"] }
+
+[lints]
+workspace = true
diff --git a/src/tokio/lsg.rs b/crates/tokio-lsg/src/lib.rs
similarity index 100%
rename from src/tokio/lsg.rs
rename to crates/tokio-lsg/src/lib.rs
diff --git a/crates/tokio-received-stream/Cargo.toml b/crates/tokio-received-stream/Cargo.toml
new file mode 100644
index 0000000..9de8700
--- /dev/null
+++ b/crates/tokio-received-stream/Cargo.toml
@@ -0,0 +1,18 @@
+[package]
+name = "rswodlib-tokio-received-stream"
+edition.workspace = true
+#description = ...
+authors.workspace = true
+repository.workspace = true
+license.workspace = true
+
+[dependencies]
+futures-util = { version = "0.3.29", default-features = false, features = ["std"] }
+pin-project-lite = "0.2.11"
+tokio = { version = "1.29.0", features = ["sync"] }
+
+[dev-dependencies]
+tokio = { version = "1.29.0", features = ["io-util", "macros", "rt"] }
+
+[lints]
+workspace = true
diff --git a/src/tokio/received_stream.rs b/crates/tokio-received-stream/src/lib.rs
similarity index 100%
rename from src/tokio/received_stream.rs
rename to crates/tokio-received-stream/src/lib.rs
diff --git a/crates/tokio-shutdown-group/Cargo.toml b/crates/tokio-shutdown-group/Cargo.toml
new file mode 100644
index 0000000..1655eb3
--- /dev/null
+++ b/crates/tokio-shutdown-group/Cargo.toml
@@ -0,0 +1,18 @@
+[package]
+name = "rswodlib-tokio-shutdown-group"
+edition.workspace = true
+#description = ...
+authors.workspace = true
+repository.workspace = true
+license.workspace = true
+
+[dependencies]
+tokio = { version = "1.29.0", features = ["time"] }
+tokio-util = { version = "0.7.10", features = ["rt"] }
+
+[dev-dependencies]
+futures-util = { version = "0.3.29", default-features = false, features = ["std"] }
+tokio = { version = "1.29.0", features = ["macros", "rt"] }
+
+[lints]
+workspace = true
diff --git a/src/tokio/shutdown_group.rs b/crates/tokio-shutdown-group/src/lib.rs
similarity index 100%
rename from src/tokio/shutdown_group.rs
rename to crates/tokio-shutdown-group/src/lib.rs
diff --git a/crates/unique-stream/Cargo.toml b/crates/unique-stream/Cargo.toml
new file mode 100644
index 0000000..957765b
--- /dev/null
+++ b/crates/unique-stream/Cargo.toml
@@ -0,0 +1,17 @@
+[package]
+name = "rswodlib-unique-stream"
+edition.workspace = true
+#description = ...
+authors.workspace = true
+repository.workspace = true
+license.workspace = true
+
+[dependencies]
+futures-util = { version = "0.3.29", default-features = false, features = ["std"] }
+pin-project-lite = "0.2.11"
+
+[dev-dependencies]
+tokio = { version = "1.29.0", features = ["macros", "rt"] }
+
+[lints]
+workspace = true
diff --git a/src/tokio/unique_stream.rs b/crates/unique-stream/src/lib.rs
similarity index 100%
rename from src/tokio/unique_stream.rs
rename to crates/unique-stream/src/lib.rs
diff --git a/src/cmd.rs b/src/cmd.rs
deleted file mode 100644
index 18084f6..0000000
--- a/src/cmd.rs
+++ /dev/null
@@ -1 +0,0 @@
-automod::dir!(pub "src/cmd");
diff --git a/src/lib.rs b/src/lib.rs
index 05a7d25..44b1149 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,3 +1 @@
-#![cfg_attr(nightly, feature(pattern))]
-
 automod::dir!(pub "src");
diff --git a/src/tokio.rs b/src/tokio.rs
deleted file mode 100644
index 00d5c9a..0000000
--- a/src/tokio.rs
+++ /dev/null
@@ -1,3 +0,0 @@
-#![cfg(feature = "tokio")]
-//! Functionality for working with tokio
-automod::dir!(pub "src/tokio");