You can log in to Jabbr with your Twitter or Facebook in a couple of clicks.
Skype had ~40 idle users, but only about 4 people who communicated regularly. It's roughly the same in Jabbr but with a few differences: Less inactive users idling in the background, no alerts on your Skype account when something is written, zero maintenance, better user privacy, no need to manually add users and a bunch of chat oriented advantages.
Objectively, Jabbr is a better platform overall for this.