On the PianoTeq forum, I recently ran across a program called Pianotuner that lets one adjust the velocity scaling of a keyboard note by note, giving one great control of the timbre you can achieve on each each key. It's a midi program that requires midiyoke and takes a minute to set up, but well worth the time. It's freeware available at:
Why might one want this? Partly if you, like me, have a keyboard that has a hard velocity response. But you can also use it to adjust keys so that they feel more like a piano you know, with lower bass notes having a darker tone, or more of a thud, if you reduce their velocity scaling.
However, my best use of the program has been in conjunction with the Velocity Floor setting in TruePianos and the Dynamics setting in PianoTeq. Both of these settings allow you to raise the amplitude of low velocity strikes. You can adjust these settings in conjunction with PianoTuner, giving some keys a slower response or faster response to velocity to match a desired timbre. In other words, you can just about set the exact timbre and volume that you want for each velocity key by key on your keyboard with very few keystrokes and no dragging of sample velocity ranges.
The result, for me at least, has been to have what feels and sounds like an entirely new keyboard and sets of pianos.