Ettercap is a multipurpose sniffer/interceptor/logger for switched LAN. It supports active and passive dissection of many protocols (even ciphered ones) and includes many feature for network and host analysis. Development has been moved to GitHub, https://github.com/Ettercap/ettercap
Tampa Network Operating System (TNOS) is an Amateur Radio application providing a BBS, chat, and many other internet servers. It has been in development since 1991 and is used world-wide. The current release (3.0) is ONLY available (at this time) via
Generating combinatorial objects: exponents, all exponents, permutations, color permutations, arrangements, combinations for any numbers and words.