Anyway, what you would suggest for a common user?
I don't know any
TOX has potential, but it is not mature project. You can also try
Bitmessage but it supports only text messages and it is not user-friendly.
If you need REAL privacy, there is no simple solutions. But if you don't mind privacy...
a) I believe that desktop version of Google Hangouts (plugin for chrome) is less maleware-like than Skype. But I would not trust Android version. Android phones with unremovable Google applications are like armed bombs.
b) Facebook and other social network are good enough. At least you don't have install a backdoor into your computer, they will work in browser
c) If you don't want to use your real name, you can try Steam. Of course steam-client is a suspicious bloatware, but it is rather popular, and messaging is not it's primary function, so Valve probably has less interests spying on you.
d) email. Despite the fact that it is totally insecure, it works almost anywhere, even on computers from 80s.
e) There are a lot of other less popular messaging services around, their security and user-friendliness may vary. Prefer ones that use open-source software first.
And it would be good idea to use asymmetric encryption (PGP, OTR) with any of above.
