Cachemate is a great rooted Android phones only for clearing your cache. Its free from three market, but I recommend supporting the developer by purchasing the app, especially if you use it often.
Features:
* clear the cache for ALL apps in one click.
* schedule the clearing of the cache.
* clear the SD CARD cache as well.
* widget one touch clear cache.
Link: https://market.android.com/details?id=com.aac.cachemate
Here is a super cool video I stumbled upon. Not really sure what it has to do with the SGS2, but its been cleverly made.
Link: Unleash Your Fingers
I found a fantastic online radio player. It has every radio station in the world (I am sure it has, but don’t sue me if I am wrong). Its called ‘TuneIn’. Some cool features of the app are setting TuneIn to wake you up as an alarm clock, setting a sleep timer, favorite stations, share, email etc.
Link: https://market.android.com/details?id=tunein.player
Here is a very useful tool that I have been using in conjunction with ClockWorkMod to setup dual boot on my SGS2. It is called HC-kTool (kernel companion toolkit) and allows me to quickly ‘reboot’ or ‘reboot into recovery mode’ or ‘reboot into download mode’ without the need to delve into menus. The creator of the app HELLCAT is well known in the android scene.
Link: https://market.android.com/details?id=net.hellcat.droiddev.ktool
Backgrounds Box HD is a new cool wallpaper app which has more than 900,000 wonderful wallpapers and about 2,000 new wallpapers added everyday. You can always find what you want. You can even search wallpapers by color. I highly recommend you to install it.
Link: http://market.android.com/details?id=com.adao.gano.bbhd3