You can check what applications are available by going to the Asterisk CLI: asterisk -r
Then core show applications
.
You can get more details on each one with core show application _____
(fill in the blank)
Something (ok, several things) seems weird about what you are saying.
Really? Then how…
FreePBX 15, webrtc, …?
I will assume that these are different customers you are working for.