SigLab is a calculator designed for working on signals. You can use it to load, save, or generate signals, and do various operations on and between signals (addition, log, abs, sin, filtering, convolution, fft, correlation, etc.). Signal parts are constantly displayed. SigLab was designed to be able to handle the results of simulations or measurements. It can handle signals with millions of points, keeping in memory a small piece of each signal. To keep good performance, it caches in memory signal portions. SigLab was specifically designed for Ptolemy users. It will start at the end of a simulation and show all asked signals.
The Simple Sockets Library makes sockets easy to use and comes as public domain source code. It resembles C's file I/O, uses whatever port is available, has named servers and port reuse, streaming/blocking sockets used, polling support, blocking/selection support via numerous functions, timeout control and firewall support.
Sitegrab is a URL grabber that parses IRC logs for data and then inserts it into a database that can be searched through a web interface using a combination of announcer name, date, partial url, and type of url. Also supported is an administration mode whereby urls can be edited and deleted through the web interface.
Sizzle is a Scheme interpreter for embedding into C applications and for standalone scripting. It implements a nearly complete subset of R5RS Scheme, adding a lot of primitives for U*ix scripting, regular expression searching, a simple module system, dynamic library linking, powerful string processing procedures, and much more. It includes a user's guide and an embedding manual in texinfo format, some examples, the embedding library, and a standalone interpreter for interactive use and scripting.
Slash'EM (Super Lotsa Added Stuff Hack -- Extended Magic) is a variant of the hugely popular roguelike game NetHack. It adds more monsters, more objects, more dungeon levels, more roles, and more races, shopkeeper services, and techniques for you to use, and invisible objects and gypsies for those who feel lucky. It also comes with a GTK windowing interface and higher resolution tile sets as options.
SmartEiffel is the GNU Eiffel Compiler. It is intended to be a complete, though small and very fast, Eiffel compiler. The current distribution includes an Eiffel to C compiler, documentation tools, a pretty printer, and various other tools including an Eiffel debugger. It also includes a large library of classes distributed under the terms of the MIT/X Consortium License. Eiffel is an advanced object-oriented programming language that emphasizes the design and construction of high-quality and reusable software.