A compressed bitmap format optimized for small, sparse sets of u32s with zero-copy querying.

A better compressed bitset in Rust

Roaring bitmaps in C (and C++), with SIMD (AVX2, AVX-512 and NEON) optimizations: used by Apache Doris, ClickHouse, Alibaba Tair, Redpanda, YDB and StarRocks

M*LIB is a library of generic and type safe containers / data structures in pure C language (C99 / C11) for a wide collection of container (comparable to the C++ STL).

asciiset is an ASCII character bitset.

A better compressed bitset in Java: used by Apache Spark, Netflix Atlas, Apache Pinot, Tablesaw, and many others

A formalization of bitset operations in Coq and the corresponding axiomatization and extraction to OCaml native integers [maintainer=@anton-trunov]

.NET wrapper for CRoaring

Rust FFI wrapper for CRoaring

Go package implementing bitsets

A tiny and robust library to manage bitflags / bitsets / optionsets in TypeScript & JavaScript

Roaring bitmaps in Go (golang), used by InfluxDB, Bleve, DataDog

Generic and iterable bit flags in Go

in memory Rust database to query your data like a Venn diagram

A library for compact bit sets containing enums.

Greg's Template Library of useful classes.

Hierarchical sparse bitset

A fast immutable bit set implementation for Go

Useful self-contained header files for Vulkan development, such as error codes and enum/bitflag serialization.

Simple C++ header-only bit flag library. Uses enum for type-safe, efficient flag manipulation.