Infrisios really spoiled us, after release the DotA Theme Manager 3 just a while ago, now he's releasing DotA Theme Manager Christmas. Infrisios never let us down with his masterpieces.
Here is the download link for DotA Theme Manager Christmas:
DTM XMAS Edition - MediaFire
http://www.mediafire.com/download.php?mwntib2qyxh

DotA Theme Manager Version 3! With new Barrens Theme!
DotA Theme Manager Version 3, with new Barrens Theme! Maybe you already familiar with the Beach Theme of DotA Allstars using DotA Theme Manager Version 2. And now the new version is available with a new theme, Barrens Theme. I will give you some mirror to download the Dota Theme Manager 3.
DTM Version 3 - Mediafire
http://www.mediafire.com/?sharekey=ecc60ccb38671293d2db6fb9a8902bda
DotA Theme Manager, Version 2 released - Snow Theme Beta Included!
Boring with all the same background and cosmetics on Dota-Allstars map? Now you can change the background into something cooler. Actually, this things is already there on DotA Allstars forums since a while ago. Watch the screenshot and be amazed! Here is some quote and note on how to install it.
Overview:1. What does this "Theme Manager" do?
The Theme Manager allows you using different terrainsets in DotA without using a different map. This works by replacing the textures/models in your MPQs - WC3's Data files - itself. It will not only change DotA's Terrain (where it has no glitches), but also other maps. In other maps, it will look quite bad, so this is more useful for DotA.
2. What does it contain?
Beach Theme: Beachterrain everywhere and "Pandaren" UI for both parties (thanks to Unwirklich)
Hell Theme: "Hell"-terrain everywhere and "Demon" UI for both parties (thanks to Unwirklich)
Snow Theme: Snowterrain everywhere and Frost" UI for both parties (made by myself, based on human UI)
Barrens Theme: "Barrens" terrain and orcish UI (by Blizzard, for both parties)
UI-only: -Pandaren or Demon User Interface for all 4 parties
3. How to use it?
(Installation)
How to install the Theme Manager?
1. If you have beachpack installed, restore to original (if you can't, it won't be too bad afaik). You would have exchanged your War3Patch.mpq in this case and should have a backup (with lower filesize).
2. Unpack the file IN your warcraft folder - in most cases C:\Program Files\Warcraft III.
3. Please DO NOT move or rename any of the files you unpacked and Go!!!
(Usage)
1. Close your warcraft AND warcraft world editor. Else it does not work!
2. Start the program. If you start it the first time, it will create a backup of your MPQ
3. Select your favourite toolkit. If you select one, it will always be activated unless you change it!
4. Start WC3. Whether you start it out of the program or not is not important.
Other maps might have a (visually) screwed terrain - I suggest you to use "original" when playing something different than DotA

Downloads: *.rar - you can only unpack these when you have winrar, but they are much smaller.
DTM Version 2 - Mediafire
http://www.mediafire.com/?zinzwjmyhqt