Nailgun is a client, protocol, and server for running Java programs from the command line without incurring the JVM startup overhead. Programs run in the server (which is implemented in Java), and are triggered by the client (written in C), which handles all I/O.

(tags: startup java performance jvm server process persistent)

A simple Facebook Platform API interface in Erlang

(tags: erlang api client facebook)

Xapian is a highly adaptable toolkit which allows developers to easily add advanced indexing and search facilities to their own applications. It supports the Probabilistic Information Retrieval model and also supports a rich set of boolean query operators.

(tags: software ruby java python tools library search php search-engine searchengine perl)