Skype uses P2P (peer-to-peer) technology to provide voice- and video-based communication with other Internet users. The technology is extremely advanced, but easy to use. It features excellent sound quality, end-to-end encryption, and automatic negotiation of firewalls or routers. Among major features are SkypeOut and SkypeIn, adding the possibility to make low-cost calls to land line phones and having a fixed number to be able to receive calls from land line phones.
Sh is a programming language built on top of C++. It can be used to write shaders that run on top of modern graphics processing units (GPUs), or write stream programs that run on GPUs or CPUs. It is implemented as a C++ library, and allows programs to be generated at run-time using a number of metaprogramming techniques. Variants of programs for different cases can easily be generated, or programs can be generated entirely at run-time from some input data. The system is cleanly separated into a frontend and backend, and is hence portable.
Da'ath is an organized, easy to use, in-depth search tool using MySQL full-text searching. This allows searching for error messages, select words, phrases, or null searches, to produce a relevant search result from searching all fields of importance. It supports full administration of creating, editing, authorizing, and deleting solutions. There is full-text searching using a MySQL database based on title, summary, and solution with filter options. It supports alternative searches through the Google and ask.com search engines. Logging and syslog is supported for tracking. There is a version history for all solutions, and a directory tree view for a quick overview of all solutions.
knuckle cracker includes a tool that compares two binary files and generates human-readable (and writable) patch scripts signed with MD5. It features smart string/binary recognition. Non-printable string portions are presented in C- like escaping style ("\x20\7\r\n"). It also features a utility that applies such a patch.
X-Plane is a flight simulator that reads in the geometric shape of any aircraft and then figures out how that aircraft will fly. It does this via an engineering process called "blade element theory", which involves breaking the aircraft down into many small elements and then finding the forces on each little element many times per second. These forces are then converted into accelerations, which are then integrated to velocities and positions. This gives X-Plane the most realistic flight model available for personal computers.