Convert your folders icons to show content of folders just like Meego, Android or even iOS. Known limitation: you have to run this app each time when content of your folders changed and you want update images on the folders.
How to use:
1. Create folders and place your apps inside using standard menu.
2. In the app, select menu and tap to “Update folders” item.
3. WAIT few seconds until popup “Folder appearance has been changed” appears.
4. Exit the app. Repeat after changes in folders.
Credit and thanks go to Mr Kryak