• wicd: no need to uninstall anything, seemingly, just use installpkg.
• kdei, assuming you haven't installed the full kdei bloat (en_gb):
  • kde-l10n-en_GB-*-noarch-1
  • koffice-l10n-en_GB-*-noarch-1

• jEdit
• ROX
• Skype (Skype4Pidgin should be buried in .purple, I think)
• SlaptGet

As root:

cd src/rubygems-1.3.7
export RUBYOPT=""
ruby setup.rb

RUBYOPT is set in .bashrc to include ruby gems, but means that ruby will fail if it can't find a working gems install.

Gems commonly used:

• mini_exiftool
• exifr
• fileutils

gem update --system          # may need to be administrator or root
gem install mini_exiftool

• Qt4 (libraries and SDK): http://qt.nokia.com/downloads
• qt4-qtruby: http://rubyforge.org/projects/korundum/