some of the free software used to build and run DSLreports.com
(I use vim)
mod perl and mysql 5.x
The perl CPAN archive
Apache 2.x and Apache 1.3
Also..
- linux distros: Fedora Core, Suse, vmware
- image server: lighttpd
- front end server: nginx
- Key value cache: MemCached
- Image processing: ImageMagick
- Browser: Google chrome with development plugins
- Security: IPtables