Open Source Packages
Libraries, frameworks, tools, and SDKs used by the apps in this directory — scored the same way as the apps themselves.
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bpaf
Lightweight, flexible Rust command line argument parser with derive and combinatoric APIs.
mail-parser
Zero-copy, RFC 5322/MIME-conformant e-mail parsing library for Rust with no required dependencies.
hjson-js
A human-friendly JSON superset with comments, quoteless strings, and optional commas — parse and stringify config files without sacrificing readability.
rasn
A safe, #[no_std] ASN.1 codec framework for Rust that encodes and decodes BER, CER, DER, PER, OER, JER, and XER from one abstract data model.
dirty-json
A permissive JSON parser that recovers valid data from malformed, hand-edited, or scraped JSON strings.
ASN1.js
A pure JavaScript/TypeScript library for encoding and decoding ASN.1 BER/DER data, the foundation of X.509 certificates and PKI.
fast-float
A zero-dependency Rust crate that parses decimal strings into f32/f64 up to 8x faster than the standard library, with full no_std support.
tree-sitter-elixir
The official Elixir grammar for Tree-sitter, powering fast, incremental parsing for editors and tooling.
react-js-cron
Customizable React component for visually editing cron expressions with Ant Design
speedate
Fast and simple datetime, date, time, and duration parsing for Rust.
luqum
Parses Lucene query syntax into a Python AST you can inspect, transform, and convert into native ElasticSearch JSON DSL queries.
tree-sitter-kotlin
A Tree-sitter grammar for Kotlin, validated against JetBrains' own PSI parser and shipped as native bindings for six languages.
lkml
A fast, dependency-free Python parser and serializer for Looker's LookML modeling language.
tree-sitter-solidity
A low-dependency Tree-sitter grammar for Solidity, designed for metaprogramming and tooling.
html5gum
A WHATWG-spec-compliant HTML5 tokenizer for Rust with pluggable emitters, letting you trade convenience for near-zero-allocation performance.
prisma-ast
Parse, query, and modify Prisma schema files as an AST in JavaScript while preserving comments and formatting.
node-logfmt
A logfmt (key=value) parser, stringifier, and structured logger for Node.js, with Express/restify body-parsing middleware and a CLI.
acorn-typescript
An Acorn plugin that extends the fast JavaScript parser with TypeScript, JSX/TSX, and decorator syntax.
email-reply-parser
Parses plain-text email replies to strip quoted history and signature blocks, leaving just the visible reply text.
later
Composable library for defining recurring schedules and calculating their next or previous occurrences.
tree-sitter-hcl
An incremental Tree-sitter grammar for HCL, the configuration language behind Terraform.
Partial JSON Parser
A zero-dependency Python library that completes and parses incomplete JSON streamed token-by-token from LLMs.
OpenAPI Pydantic
Type-safe OpenAPI 3.0 and 3.1 schema models for Python, built on Pydantic 1.8+ and 2.x for validated construction and parsing.
tree-sitter-verilog
SystemVerilog and Verilog grammar for the tree-sitter incremental parser.
