Shout is a free Android Apps that helps to turn mobile into mic. After install this app you can convert your mobile into mic and connect any speaker via earphone jack.This app is very helpful those who are training in public speaking.
Screen Rotation Control is free Android Apps that helps to keep mobile screen in landscape mode always. You can install this app from play store. After the installation you will get four options, it involves portrait, landscape, reverse portrait and reverse landscape.
It is very simple and clean, doesnâ€™t have any unnecessary options.