I've used Verse, QT9, and QCBD. I don't believe QT9 will suitably meet requirements for Part 11 but I believe I've seen that the other 2 can. I wasn't involved in setup / tailoring QT9 but the other 2 were sufficiently extensible / tailorable to meet needs.
One thing to be aware of with any such tool: expect to allocate time to setup (and validation since you are in the device forum) and then ongoing care and feeding. After setup, most run mostly unattended but do require some admin support from time to time.