> ## Documentation Index > Fetch the complete documentation index at: https://site.aspect.build/llms.txt > Use this file to discover all available pages before exploring further. # Open Source Projects > Index of Aspect's open-source Bazel projects: rulesets, the Aspect CLI, Gazelle generators, and shared utilities organized by language and category. Aspect maintains a broad portfolio of open-source Bazel rulesets, tools, and examples. Most repositories live in the [aspect-build GitHub org](https://github.com/aspect-build); some have been donated to the [bazel-contrib org](https://github.com/bazel-contrib) for community co-maintenance. See [Contributing](/open-source) for our contribution philosophy and prioritization framework. ## Python | Repository | Description | | ----------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | [rules\_py](https://github.com/aspect-build/rules_py) | High-performance Python rules with native `uv` integration, strict hermeticity, and optimized OCI image layer support. Drop-in replacements for `py_binary`, `py_library`, and `py_test`. | ## JavaScript and TypeScript | Repository | Description | | --------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------- | | [rules\_js](https://github.com/aspect-build/rules_js) | High-performance Bazel rules for JavaScript and Node.js using a pnpm-based package layout. The foundation of Aspect's JS ecosystem. | | [rules\_ts](https://github.com/aspect-build/rules_ts) | Canonical Bazel rules for TypeScript, built on `rules_js`. Provides `ts_project` for transpilation and type-checking. | | [rules\_swc](https://github.com/aspect-build/rules_swc) | Bazel rules for the SWC Rust-based JavaScript compiler — Babel-compatible transformations at \~20× the speed. | | [rules\_esbuild](https://github.com/aspect-build/rules_esbuild) | Bazel rules for the esbuild bundler with a hermetic toolchain — no `npm install` required. | | [rules\_webpack](https://github.com/aspect-build/rules_webpack) | Bazel rules for Webpack, for teams migrating from existing Webpack builds. | | [rules\_rollup](https://github.com/aspect-build/rules_rollup) | Pure-Starlark Bazel rules for the Rollup bundler, compatible with the `rules_js` ecosystem. | | [rules\_terser](https://github.com/aspect-build/rules_terser) | Bazel rules for the Terser JavaScript minifier. | | [rules\_jest](https://github.com/aspect-build/rules_jest) | Bazel rules to run tests with the Jest test runner. | | [rules\_jasmine](https://github.com/aspect-build/rules_jasmine) | Bazel rules to run tests with the Jasmine test framework. | | [rules\_cypress](https://github.com/aspect-build/rules_cypress) | Bazel rules to run end-to-end tests with Cypress. | | [rules\_nodejs](https://github.com/bazel-contrib/rules_nodejs) | Bazel rules for fetching the Node.js binary and `@bazel/runfiles`. Long-term maintained by Aspect under `bazel-contrib`. | ## Build File Generation | Repository | Description | | ---------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | | [aspect-gazelle](https://github.com/aspect-build/aspect-gazelle) | Pre-compiled Gazelle binaries bundling BUILD file generators for Python, JavaScript & TypeScript, Go, Protobuf, C/C++, and Starlark, the Orion host for AXL-based custom generators, plus gitignore support, file-based caching, and Watchman-powered watch mode. See [How to extend Gazelle](/docs/cli/guides/gazelle). | ## Linting and Formatting | Repository | Description | | --------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | | [rules\_lint](https://github.com/aspect-build/rules_lint) | Runs linters and formatters as standard Bazel actions across 20+ tools (ESLint, Prettier, Ruff, gofmt, and more), with Remote Execution and Remote Cache support. See [Linting & Formatting](/docs/bazel/linting). | ## Images and Containers | Repository | Description | | -------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------- | | [rules\_oci](https://github.com/bazel-contrib/rules_oci) | Bazel rules for building OCI container images without Docker. Built by Aspect under `bazel-contrib` in collaboration with Google. | ## Examples and Templates | Repository | Description | | -------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | [bazel-examples](https://github.com/aspect-build/bazel-examples) | A polyglot reference monorepo demonstrating Bazel at scale across Go, Python, Java, JavaScript, Rust, Ruby, and more. Also the live test bed for Aspect's CI integrations. | | [aspect-workflows-template](https://github.com/aspect-build/aspect-workflows-template) | Source of truth for the project templates rendered by `aspect init` and published as the `aspect-starters` repositories. | | [aspect-starters](https://github.com/aspect-starters) | Per-language starter template repositories (go, js, py, java, kotlin, cpp, rust, ruby, scala, shell, minimal, kitchen-sink). Use GitHub's "Use this template" button, or `aspect init --preset `. | ## Aspect CLI | Repository | Description | | -------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------- | | [aspect-cli](https://github.com/aspect-build/aspect-cli) | A programmable task runner built on top of Bazel. Supports custom tasks via the [Aspect Extension Language (AXL)](/docs/axl/types) — a Starlark dialect. | ## Utilities and Libraries | Repository | Description | | ---------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------- | | [toml.bzl](https://github.com/aspect-build/toml.bzl) | A small Bazel library for consuming TOML files in repository rules, following the API convention of Bazel's built-in `json` module. | ## Under `bazel-contrib` Projects Aspect authors or maintains under the community `bazel-contrib` org: | Repository | Description | | ----------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | [bazel-lib](https://github.com/bazel-contrib/bazel-lib) | Common utility rules and functions for writing Bazel rules in Starlark. Originally authored by Aspect; donated to `bazel-contrib`. | | [publish-to-bcr](https://github.com/bazel-contrib/publish-to-bcr) | Automation for publishing Bazel module releases to the [Bazel Central Registry](https://registry.bazel.build). Originally built by Aspect; donated to `bazel-contrib`. | ## Contracted Maintenance Projects owned by third parties that Aspect maintains under contract: | Repository | Owner | Description | | ----------------------------------------------------------- | ---------- | -------------------------------------------------------------------------------- | | [rules\_apko](https://github.com/chainguard-dev/rules_apko) | Chainguard | Bazel rules for apko — builds OCI images from APK packages without a Dockerfile. |