ActiveSync Toggle (free: micrologics.co.uk): this is convenient when using a BT adaptor which is not always plugged in because it stops ActiveSync initialising on every restart and asking about the COM port.  In particular I find ActiveSync Toggle makes it easy to start/stop ActiveSync 4.1 one-click from the Windows XP launch bar (using parameter /toggle) and stops ActiveSync 4.1 including rapimgr.exe.