POPular is a suite of programs for setting up a large distributed mail cluster. Included are a POP3 server and proxy and several utility programs for delivering mail into mailboxes, listing the current connections, and configuring the servers. POPular supports virtual servers, scales to millions of mailboxes, is completely configurable at runtime and uses a flexible authentication mechanism through shared library modules.
OOMPI is an object-oriented interface to the MPI message passing library standard. It is used at a much higher level than the standard MPI C++ bindings, providing a full class library that takes advantage of many C++/object oriented abstractions for message passing. It is a thin layer that runs over any MPI-1.1 compliant C implementation.
Libcwd is a full-featured and well-documented library that assists C++ developers with debugging their applications. It includes support for ostream-based debug output, custom debug channels and devices, memory allocation debugging, run-time sourcefile:linenumber information, and demangled type names of variables. It is thread-safe.
Alt+Connect manages dialup connections, allowing a group of networked machines to share a single Internet connection through their server. Custom client software lets users to start or stop their internet connection, and the server (connectd) ensures that the connection remains up only while someone's using it. Features include support for multiple ISPs and links (modems or ISDN channels), connection control lists, ability to record the time a user spends online and charge him for it, and the ability to enable and disable IP forwarding as a machine starts or stops using the Internet.
rawrec and rawplay are utilities designed to provide the user with a simple way of recording and playing raw audio data. Options exist to control the timing and padding of the run as well as the dsp parameters. The main ring buffer size and buffer fragment size can be set if desired. These programs are particularly useful in conjunction with the sox utility.
rproxy is an extension to HTTP which allows transferring of differences between a web server and client, using an algorithm similar to rsync's. This works particularly well for dynamically-generated sites, where the pages are often similar but not the same on each visit. Transferring just the difference reduces network traffic and therefore loading time.