There are different free alternative service available.
Windows Remote Desktop
Available for Windows and Mac.
VNC
Multiplatform. There are different clients like TightVNC (free), Ultra VNC (free) and RealVNC (free and pay).
Join.me
Meeting service.
WebEx Free
Software from Cisco.
TeamViewer
It is free for the client in the computer remotely access, but you need a license on the computer performing the connection.
WebRTC
Theorically it is possible to control remote computer using WebRTC on supported browsers (Firefox, Chrome, Opera), though I have not experimented myself.
External References
- “5 alternatives to LogMeIn Free for remote PC access” by PCWorld.com