An extremely fast Python linter and code formatter, written in Rust.
salsa
Counted from the Cargo.toml manifests of the 25 indexed repositories that declare salsa as a dependency — not download counts. Dependency data last verified 2026-08-09.
Crates that show up unusually often in salsa projects. The most distinctive pairings rank first — crates these projects use far more than the average indexed Rust project does, not just crates that are popular everywhere. Each percentage is the share of salsa projects that also use it.
A toolchain for web projects, aimed to provide functionalities to maintain them. Biome offers formatter and linter, usable via CLI and LSP.
A Rust compiler front-end for IDEs
The AI framework that adds the engineering to prompt engineering (Python/TS/Ruby/Java/C#/Rust/Go compatible)
A minimal, secure Python interpreter written in Rust for use by AI
Cairo is the first Turing-complete language for creating provable programs for general computation.
Emerging smart contract language for the Ethereum blockchain.
The CLI for codemods: scaffold, share, and run multi-step transformations of any size. First-class ast-grep support. Fast, reliable, polyglot.
A language server implementation for WGSL and WESL
Erlang Language Platform. LSP server and CLI.
Ark, an R kernel
A SQL transformation engine that type-checks your whole pipeline and catches breaking changes before they run — branches, replay, column-level lineage, compile-time contracts, per-model cost. Adapters: Databricks, Snowflake, BigQuery, DuckDB. Single static Rust binary. Apache 2.0.
The Cairo package manager
Language server, formatter, and linter for Markdown, Quarto, and R Markdown
A language server for the Django web framework
system dynamics modeling
Full-featured language server and other tools for WebAssembly, making WebAssembly development fast, safe, and joyful.
LaTeX language server, formatter, and linter
A rust crate for creating AST and LSP servers powered by tree-sitter.
Basel Haskell Compiler - A next-generation Haskell compiler and runtime for 2026
A language server for TableGen and a VSCode extension
Julia language server, formatter, and linter built in Rust
Language server, formatter, and linter for R
The Cairo Language Server