I have been using CometChat with my Q2A site. I purchased their Premium Edition and they performed the complete installation for me. Works well :D
Welcome to the Q&A site for Question2Answer.
If you have a question about Q2A, please ask here, in English.
To report a bug, please create a new issue on Github or ask a question here with the bug tag.
If you just want to try Q2A, please use the demo site.