A hash array-mapped trie implementation in C
High-performance immutable data structures for modern JavaScript and TypeScript applications. Functional interfaces, deep/composite operations API, mixed mutability API, TypeScript definitions, ES2015...
Purely functional data structures in Java
Hash Array Mapped Trie as defined in Phil Bagwell (2001). Ideal Hash Tries
PHP immutable persistent data structures library
Efficient immutable hash map implementation written in go.