By iMatix Corp., portable function library for C/C++ programs; many years development; written in ANSI C; ports: DOS, OpenVMS, OS/2, most Unix, Windows; full sources and documentation (HTML); given as Open Source software for the benefit of Internet commu http://www.imatix.com/html/sfl/
Package containing double and single precision flavors of the Levenberg-Marquardt algorithm. Included are versions with analytic and finite difference approximated jacobians. [Open source, GPL] http://www.ics.forth.gr/%7elourakis/levmar/
A library for dispatching messages to huge groups of users over an arbitrary number of separate communication channels in real-time using IRC protocol. [Open source] http://schumann.cx/ircg/