Download link: http://crocko.com/1702581605.html
What is it for ? This tool lets advance in a replay at a point X in time. Very useful when you need to check a maphacker for example.
-You can change the speed of the replay from 1/32x to 31x or make it run "as fast as possible". -You can specify the position in the replay that you want to reach, and ReplaySeeker will quickly fast-forward replay to that position, pausing the replay when done and playing a sound (to notify you). Note that this works while Warcraft is minimized, which allows you to do something else during the process (like browsing the forums).
You will need to install the .NET Framework Version 2.0 Redistributable Package.
For x86 Windows: http://www.microsoft.com/download/en/details.aspx?id=19
You probably have that if you already have Gproxy.
For Vista/7 users: You might need to run the executable file as administrator. Right click and click on "Run As Administrator".