The last two years i'm developing a regular expression library named FIRE (aka Fast Implementation of Regular Expressions). It is a DFA based engine and has very good performance (better than JDK's regex library). I want to release the code, but the problem is that i never have time to make a release bundle, and fix missing features.
As a byproduct of FIRE, i developed SARE (Simple API for Regular Expressions) and Regular Expression Benchmarking Utility.
I am working on a compiler project for now (yeah, my phd project), and i will resume the development of FIRE, after 3rd April.