Below is the compilation list of Free Remote Management Tool which can be used to remotely support, control etc.

1. Microsoft Remote Desktop (RDP) - Comes with Microsoft Windows
2. Real VNC - http://www.realvnc.com/
3. Tight VNC - http://www.tightvnc.com/
4. Ultra VNC - http://www.uvnc.com/
5. Join Me - https://join.me/
6. mRemoteNG - http://www.mremoteng.org/
7. WebEx - http://www.webex.com/ (Sign Up For Free with 1 host session and 3 people in a meeting)
8. Showmypc - http://showmypc.com/
9. Ammyy Admin - http://www.ammyy.com/en/
10. Skeep - http://sourceforge.net/projects/skeepvncconsole/
11. Pocket Cloud - http://www.pocketcloud.com/
12. Zoho Remote Support - https://www.zoho.com/assist/
13. Skyfex - http://skyfex.com/
14. Litemanager - http://www.litemanager.com/