Thanks for a good, working firewall for Linux. The ease with which the program installs, along with the easy to understand documentation, provides us Linux users with security akin to Raptor and Checkpoint.
IPChains is easier than IPFwAdm
I agree, I had a much easier time setting up firewalling under ipchains than ipfwadm. ipchains has some nice powerful options that are quite easier to configure in only a few commands... I found I needed fewer ipchains commands to do what I was doing with ipfwadm.
An open, cross-platform journaling program.
A scientific plotting package.