Warcraft 3 Patch

This is the place you can get the patch for Warcraft 3, if you don't want to use the Bnet auto update.

Blizzard's Official Web page

Latest Patch is the v1.23

There are 2 types of patch files,
one is for Warcraft 3 - Reign Of Chaos and the other is for Wacraft 3 - Frozen Throne.

If you have Frozen Throne installed, the frozen throne patch is all that you'll need. If you don't have the Frozen Throne installed, just download Reign of Chaos patch.
Take note and don't download the wrong one.