isectd is a middleware daemon that provides many-to-many client-to-server connectivity. Supports multiplexing requests to multiple server processes over IP networks.
EMBOSS is a dynamic and comprehensive Open Source package for bioinformatics (DNA and protein sequence analysis, protein structure, phylogenetics, etc.). EMBOSS is written in C, also compatible with C++, and has a separate Java interface (Jemboss)
The comprehensive C++ library MGEN for IC layout and connectivity comes with the X11/Motif full custom layout editor PARIS and the powerful waveform viewer/processor MANIAC. Industry proven, it is the basis for layout generators, placers, routers etc.