Like cog, I can't live without vim as text editor. There are basicly 2 things I do with visual interfaces:

Browser: Galeon. Don't ask, I like it, and that's all.
Email Client: KMail.

Everuthing else I do at the prompt.

The other Tools I can't live without are, mostly:

• PIPEs
• Vim for text editor
• CVS (maybe soon I'ld look to subversion as everyone talks so good on it).
• ssh
• mysql (prompt client) - I not only keep almost all my data structs in my head as long as I am working in a project, but also create and change all my data structs in the prompt as needed.
• some wiki. I use this to create and keep the documentation for my (clients) projects. I'm currently using MaBliki, that is a blog wiki engine, I wrote in HTML::Mason.

Things I miss right now:

• Bug control: I did looked to bugzilla, and I didn't like what I saw, but didn't found nothing better. Anyone have a simple and good one?