IMCapture for Skype (was SkypeCap) captures and records audio and video calls made from Skype.
Callnote Premium is a Free app for recording Skype, Hangouts, Viber, Facebook, GoToMeeting and WebEx Audio&Video Calls.
Call Recorder for FaceTime allows you to record FaceTime audio and video calls.
G-Recorder is a simple yet powerful call recorder.
Record FaceTime audio and video calls directly to your Mac.