autoSelfie 
This app can log in to twitter and post selfies to your twitter feed. It can take a picture with the camera or select a picture from your gallery. It hooks into the opencv manager and uses opencv and face recognition to alter the images. The results can be seen by searching for #autoselfie on twitter.com
Dependancies: It uses support library, appcompat and twitter4j.It also uses the opencv jar, opencvlibrary-2.4.6.jar