We recently discovered this great free alternative to Skype which doesn’t need to be installed on your system. You can access it directly on the web at https://whereby.com. You can have video conversations with up to 4 people at once and guests to your “room” don’t have to register to join in.
It takes less than a minute to create your room and share the link with someone you want to join you for a video chat.
I suggest you “claim” your room by registering; this allows you to “lock” your room to stop non-invitees from joining; it also reserves the room for you so that no-one else can claim it. There’s lots of information on their site but essentially it’s a very quick and easy process.
Update: Zoom (https://zoom.us/)
Zoom is a great replacement, not only for Skype, for also for TeamViewer as it can also allow secure remote access for help with your computer!
You need to create and maintain an account via zoom’s web portal. Then you download the app (https://zoom.us/download) and install it into your system – very easy! The advantage of running the program from your system instead of the via web is that it is much faster than the http(s) protocol, so video and audio work better with less break up.