Web browsers, Email and RSS clients, IM etc.
Add some more fun to your Puppy!
Word processing, text editors, spreadsheets, calendar.
Paint, image manipulation, 3d modelling software.
Video, music applications.
Windowmanagers, themes, eye candy.
Home network, remote access.
Compilers, interpreters, IDEs.
Setup, hardware, libraries.
Any other programs (science, math, utilities, emulators, whatever).