The official SuiteSparse library: a suite of sparse matrix algorithms
Digital library with smart shelves
An interactive graphing library for R
The Refactoring library based off the Refactoring book
GraphQL server library for Rust
General purpose algebraic metaprogramming
Building R packages
Spark Cool Play: Spark source code analysis, Spark class library, etc.
A lightweight library for managing forms in Svelte
Using MuPDF library in FreePascal/Lazarus
Full featured editor for reading and manipulating MARC Records