* [KektorDB v0.6.2](https://github.com/sanonone/kektordb) – Embeddable in-memory vector and graph database combining HNSW-based similarity, hybrid BM25 search, and built-in RAG and AI gateway features.

* [RubyTree R2.2.2](https://github.com/evolve75/RubyTree) – General-purpose tree data structure implementation for Ruby with node-centric APIs for creation, traversal, and serialization.