The three apps I use the most are MicroB, Modest, and Media Player. I know MicroB and Modest are always running daemonized, so I don't keep their windows open. (If they weren't daemonized, I'd make them so.) Media Player is almost daemonized, since music is a "background" task for me. The UI is great at supporting multiple background applications, but I quickly hit CPU / memory limits if I have too many things open. One JavaScript-heavy page in MicroB or a FLAC being decoded in MediaPlayer, and the poor little NIT is hurtin'.