It has taken a while to code this service application but i hope you all gonne enjoy its ease..
In the upcomming versions FULL extension management is supported. You can then also see what versions you have installed, and then have the ability to update. You can also synchronize the Runtime with the Edittime extensions.
Why don't you check it out? http://www.maxxgames.com/extensions/
-Direct download from internet using online extension list
-Download manager (with que)
-Fast extension downloading
-Seperate Edittime/Runtime version installation
-Install multiple extensions at once (batch)
-Read usefull extension information before installing
-All-in-one-screen direct interface (compact)
Extension developer features:
-Free extension pack manager
-Pack more then one extension inside your package.
-No directory structures
-Configure clickable Author URL
-Password protect your extension pack (very usefull for commercial extensions)
-Configure MMF2 categories