I know many folder synchronization tools for desktop users (ie. Windows Live Sync)
Should I use them to synchronize applications between servers or there is a more enterprisey solution?
How about using DFS? It'll replicate files between servers (seeing as that's what it was designed for).
How are your servers connected? Have you tried Microsoft's own Synctoy? Not sure if it's "enterprisey" enough for you, though :) For small shops it's working just fine.
Robocopy is another option