A man that calls himself 
8882 has compiled a great map package with 202 (!) micromanagement maps where you play against computers, yourself or against other contestants.
If you feel like you want to test your micromanagement with yourself, the computer, or against your friends and or enemies, this is the map package for you. The maps are sorted and named in a neat way, and includes a total of 202 maps! Some of them are really bad because of the imbalance, but some are really good, like Team Micro Arena (picture) and Team Micro Platform. The map package weighs 13.6 MB, and should give you many hours of nice UMS play!8882's personal recommendations
In the readme file that comes along with the map package, you may find a list of the maps that 8882 recommends, everything from Micro Training 3v3 to Dropship Training.
If you have a good micro map that doesn't exist in this map package, he would like to have it. Write an e-mail to [email protected] with the map.
Links
SCTactics.com - Download the map package
mensaa.com - Mirror by Quiksilver
TeamLiquid.net - Source