A public libevent repository. The official repository is at https://github.com/libevent/libevent

Time Series data structure for Redis

LevelDB is a fast key-value storage library written at Google that provides an ordered mapping from string keys to string values.

Free and Open, Distributed, RESTful Search Engine

Redis is an in-memory database that persists on disk. The data model is key-value, but many different kind of values are supported: Strings, Lists, Sets, Sorted Sets, Hashes, HyperLogLogs, Bitmaps.

带有详细注释的 Redis 3.0 代码（annotated Redis 3.0 source code）。