Log analyzer - nice graphical analyzer for ADIF/Cabrillo/REG1TEST-Edi/STF-Logfiles
DR2W DX Propagation - check band conditions
Bastelbunker - some nice ideas for tinkering with hardware and antennas
DARC-Online Lehrgang - helps you on your way to the licence in germany
Repeatermap - its a Repeatermap, wohooo
Funkbasis - Forum for german Amateurfunker und Funkamateure (you will get that one only if you speak german native)
Sächsischer Bergwettbewerb - local contest where you can get points if you have QSO from/to a mountain
PSKreporter - stalk my digital activities (24h only)
Neuner Funkgeräte - online shop where i buy almost all of my gear. Fast, nice, reliable, fair prices.