SimpleTelnet is a small telnet client suitable for embedded systems.
Trickle is a Linux kernel traffic control module, providing a better Internet browsing experience on workstations.
Firejail is a SUID sandbox program that reduces the risk of security breaches by restricting the running environment of untrusted applications using Linux namespaces. Firejail started as a simple Linux namespaces sandbox for Mozilla Firefox, similar to the sandbox found in Google Chrome/Chromium.
l3net - a layer 3 networking blog 