NetX provides a drop-in replacement for javaws (Java Web Start). Since upstream NetX is dead, the IcedTea Web project is hosting a fork of the original code. However, as icedtea-web has evolved to complex set of tools, extensions and tests, it has now only a few lines of code shared with the original implementation.

jq is like sed for JSON data – you can use it to slice and filter and map and transform structured data with the same ease that sed, awk, grep and friends let you play with text.

Squid is a high-performance proxy caching server for web clients, supporting FTP, ICY and HTTP data objects.

DansGuardian filters the content of pages based on many methods including phrase matching, PICS filtering and URL filtering. It does not purely filter based on a banned list of sites.

This is the portable version of OpenSSH, a free implementation of the Secure Shell protocol as specified by the IETF secsh working group.