DX Sherlock 2.3 -
450MHz an up
50 & 70MHz Chat
144 & 432MHz Chat
Above links lead to HTML based chat, but I can strongly recomend to use KST2me, a free telnet based client developed by OZ2M Bo.
Download KST2me here
If you want to make flight scatter QSO´s on 432 & 1296 MHz, you can calculate bearing and see where the flight have to be located when QSO should be possible by using SM7LCB Path and scatter Map II
You can also choose the programm "AirScout" developed by DL2ALF.
This program makes it easier to determine when you are capable of using an airplane for scatter QSO.
If you´r active on VHF/UHF/SHF in Denmark, you have to visit the Danish VUSHF page.
Hope to see you on the bands soon!