Snort is a network intrusion detection and prevention system. It is the most widely deployed technology of its kind in the world. It performs detection using a variety of methods including rules-based detection, anomaly detection, and heuristic analysis of network traffic. Its rules language is open source and available to the public as well.
baresip is a bare-bones SIP user agent. It supports SIP, SDP, RTP/RTCP, and STUN/TURN/ICE, and IPv4 and IPv6, and is RFC-compliant and has portable C89 and C99 source code. A modular plugin architecture provides stdio, cons, and evdev user interfaces, celt, g711, g722, gsm, ilbc, l16, and speex audio codecs, alsa, coreaudio, gst, portaudio, oss, winwav, and mda audio drivers, speex_pp, speex_aec, speex_resamp, and sndfile audio filters, the avcodec video codec, avformat, quicktime, qtcapture, v4l, and v4l2 video sources, sdl, opengl, and x11 video display drivers, and srtp media encoding.
blogstrap.py is a simple, no frills blog content management system powered by Twitter's Bootstrap and web.py. It features most things you would come to expect from a simple blogging platform. You can browse posts by category or subcategory, see recent posts, and mark favorites. You can perform basic searches. It includes an About page. A basic tag system is implemented (popular tags are counted and shown). A simple comment system is available. A robust administrative interface is included where you can create and edit posts. You can upload images and include them on a Credits page, where you can properly attribute the original author. Comments can be set to on, off, or manual approval (moderated). Security has been a top priority since the beginning. Blogstrap.py has low resource usage and runs quickly on top of Lighttpd.
LibRaw is a library for reading RAW files obtained from digital photo cameras (CRW/CR2, NEF, RAF, DNG, and others). LibRaw is based on the source codes of the dcraw utility, though some of the drawbacks of dcraw have been eliminated. The users of the library are provided with an API to be used when writing their software programs.