EJDB NoSQL database
Embeddable (in-process) database engine designed for fast quetyng collections of JSON documents and other persisting data. Implemented as a C library based on TokyoCabinet key-value storage engine. Design was inspired by MongoDB and follows the same philosophy, especially for the query language. Bindings avaliable for nodejs, Python, .Net (C#), Ruby, Lua, Java languages.
C11 key/value database engine
IOWOW - The C11 persistent key/value storage based on skip list data structure