cygbuild is a porting tool for making Cygwin net releases. It helps Cygwin source and binary package maintainers to configure, build, strip, produce diffs, and generate Cygwin specific files. To put it simply, it converts any freely available program or package into a complete Cygwin net release distribution.
Teractualizar is a daemon to synchronize files using SFTP as a secure transfer method. It also features the ability to upload and execute any application or command, which can be used to manage clusters of computers. It requires only baaic Unix commands, an SSH client, and the SFTP service. Currently, the client side of this system only runs on Windows NT (and derivative operating systems).
adslometer is a script to log your router's connection information. It allows you to track line problems, analyze them, or get statistical information about your Internet connection. It currently supports the SMC7908A-ISP VOIP router from the Ya.com Spanish ISP, the Zyxel 660HW from Telefonica's ISP, and the Conceptronic C54APRA2+.
easy-rsa is a small RSA key management package based on the OpenSSL command line tool. While it is primary concerned with key management for the SSL VPN application space, it can also be used for building Web certificates. It was originally included as part of OpenVPN, but is now a separate project.