SourceAFIS is a fingerprint recognition/matching SDK (library), or more generally an Automated Fingerprint Identification System (AFIS). It essentially compares two fingerprints and decides whether they belong to the same person. It can quickly search a large database of registered fingerprints. It comes with an easy-to-use API (pure .NET and Java) plus assorted applications and tools.
jCores is a Java library that feels like jQuery, with many shortcuts and transparent parallelism. It was made to denoise programming in the Java language and to increase execution speed. Its goal is to demonstrate that Java, the language, can be as sexy as Python in terms of hacking and as parallel as your hardware gets in terms of CPUs.
gweb++ is an asynchronous event-driven Web server and reverse proxy. It is written in C++, but it doesn't make use of the STL or of any additional libraries. It supports the following event notification mechanisms: epoll (edge-triggered, Linux), kqueue (FreeBSD), port (Solaris), poll, and select. It has the following main features: HTTP/1.1, reverse proxy, FastCGI, configurable via an XML file, MIME types support, pipelining, virtual hosts, Keep-Alive, directory listing (with an optional footer file), handling of the If-Modified-Since header, HTTP ranges, logs, configurable access logs, and log rotation.
OpenSimulator is a multi-platform, multi-user 3D distributed virtual environment platform. Out of the box, it can be used to simulate virtual environments similar to that of Second Life. These can be used as social virtual worlds or for specific applications such as education, training, and visualization. Access is via the regular Second Life open-source viewer or via third-party clients. There are a number of private and public deployments of OpenSimulator, including OSgrid, which has over 8000 regions hosted by independent individuals and organizations spread over the Internet.