MIDIClock is software that can be used for synchronization of MIDI devices.
The BPM rate is controllable through Tap Tempo and Customizable Midi Input.
Midiclock provides clock output to up to 2 selectable MIDI outputs.
Synchronize your sequencers, synths, drum machines, guitar effect processors, …
by using this software ! Download it here.
Read the documentation here.
Get a license here.

Unlimited usage requires registration. Any questions can be mailed to serge[AT]midiclock.com.