Search for remote administration tool

The post was published at the request of NermaN , which he himself cannot write due to karmic problems.

Habraludi, please tell me a program under Windows for remote control of a computer through a web-interface, one of the basic requirements: open source or at least free. LogMeIn PRO fully knows how to do it, but I did not find a free analogue.

From myself I will add that many recommend the following services:
Adobe ConnectNow
Ammyy Admin - 100% Free for non-commercial use.
Skyflex
Team viewer
But they are not suitable for one reason or another.
Thanks in advance for your help.