oRTP is a library implementing the Real-time Transport Protocol (RFC3550), written in C. It is easy to use and provides a packet scheduler for sending and receiving packets on time, adaptive jitter compensation, automatic sending of RTCP compound packets, and the RTCP parser API. It works with IPv6.
The POCO C++ Libraries are a collection of class libraries for developing network-centric, portable applications in C++. The classes integrate perfectly with the C++ Standard Library and cover functionality like threads, thread synchronization, filesystem access, streams, shared libraries and class loading, sockets and network protocols (HTTP, FTP, SMTP, etc.), including an HTTP server, as well as an XML parser with SAX2 and DOM interfaces and SQL database access.
WebGlimpse is a scalable, feature-rich search engine for indexing your Web site or any collection of local and remote sites you choose. Features include customizable output formats, custom ranking/ordering of hits, fuzzy matching, boolean queries, a Web administration interface for multiple archives, logging of queries, caching of results, and more. Localized search interfaces are provided in multiple languages including Spanish, German, French, Italian, Norwegian, Finnish, Russian, Hebrew, and others. It supports 3rd party filters for indexing PDF, Word, and Excel files. It is free for academic and most nonprofit users.
Sophie is a daemon which uses 'libsavi' library from Sophos anti-virus vendor (http://www.sophos.com). On startup, Sophie initializes SAPI (Sophos Anti-Virus Interface), loads virus patterns into memory, opens local UNIX domain socket, and waits for someone to connect and instructs it which path to scan. Since the database is loaded in RAM, scanning is very fast. (Note: speed of scanning also depends on SAVI settings and size of the file.) It works on Linux, Solaris (Sparc/x86), HP-UX, and FreeBSD.