FOSS, cross-platform (not mobile yet though, if you can throw money at that, it can be done), encrypted audio/video, in active development. You can use any XMPP account you like. It even has call recording built in which is very handy if you might need to remember or protocol things.
FOSS, cross-platform (not mobile yet though, if you can throw money at that, it can be done), encrypted audio/video, in active development. You can use any XMPP account you like. It even has call recording built in which is very handy if you might need to remember or protocol things.