i got
1) Web Developer
2) Searchstatus
3) checky
4) HTML Validator
5) IE View
6) Firesomething
7) about: kitchensink
8) Egg0n
9) I must not fear !
10) ColorZilla
11) VirtualJoint
12) Vbrowseit
1) View Formatted Source (very cool/ usefull for looking at linked CSS)
2) Web Developer
3) Tiny URL addon
4) Play Launch
....Im looking for more that may be useful right now.