I can't find a program for screen sharing, really. I mean it:
- Cross platform. Windows, Mac and Linux, not just Win+Mac.
- Free. Not free for personal use only (TeamViewer), not free for 1 month, just free as in "freedom".
- Works. Not cripled as Skype (Windows -> Linux screen sharing)
- Simple. Grandma-level.
Are these demands too high?
Discord - no screen sharing yet (and may become shit like Skype if it stays closed and MS buys it then)