As programming tool, I\'d suggest the Anjuta IDE. I really love it, but it is a complete IDE, which might be too much for your needs.
As for video player, I use Totem (with Xine). You can also install OpenOffice.org. Maybe also Abiword might be stable by now, but I haven\'t checked it recently.
There is no X version of winamp, but the XMMS looks like it and can do similar things, even the winamp 2.0 skins work with it.
I use X-chat for chatting. Don\'t forget the GIMP!