Remote Desktop Managers

Do you have multiple RDP-sessions on you're computer and would you like to manage them more efficiently?
If your answer is YES!, than have a look at Remote Desktop Connection Manager 2.2 (it's a free) from Microsoft. It has some nice feautures like thumbnails from RDP-sessions, and you can switch rapidly between sessions.
Other free alternatives are: Remote Desktop Manager (standard edition) , Terminals, CoRD for Mac and RDTabs.
Non-free alternatives are: VisionApp Remote Desktop, Royal TS (10 connections free)

If you have problems connecting to the machines with these tools but not with the standard RDP-utility (Mstsc.exe), you might consider installing Microsoft's RDP 6.x and up and registering Mstscac.dll (RDP ActiveX component) with: regsvr32.exe c:\windows\system32\mstscax.dll