pyshaper is a simple yet very versatile dynamic bandwidth manager application for Linux platforms. Most other bandwidth managers (also called 'traffic-shapers'), work on 'static shaping', in other words, by passing a static set of shaping rules to the kernel. pyshaper works by periodically scanning existing TCP connections, matching them against rules, and throttling their bandwidth accordingly in real time.
bastion-firewall is a netfilter-based firewall for Linux that can be configured with config files and used as a normal firewall or as a firewall script generator. It can generate graphical statistics of all the rules traffic in the firewall with Rrdtool. It's integrated with the Snort Inline IPS.
Rateless-coded Transport is a set of applications that use ground-breaking error correcting codes technology. They support fast reliable transmission over UDP, live content streaming and Internet multicast trees, duplex firewall transparency, ultra-fast reliable transport for WANs (up to 40-times faster than TCP), and optimal peer-to-peer multi-source download protocols.
chownat allows two peers behind two separate NATs and firewalls to establish a direct connection with each other. No port forwarding, DMZ, third party, proxy, spoofing, elevated user privileges, or DNS tricks are required. More importantly, it opens up a tunnel between the two machines so one peer can access a service, such as SSH or a Web server, on the other machine which is also behind a NAT.