App Lock and Gallery Vault - Wish you could simply lock all your private apps on your smartphone with just a click?
AndreaMosaic - With AndreaMosaic you can create your own photographic mosaics made with your own pictures.
Hexlock - Security app locker keeps apps private with smart profiles for any situation
WidsMob Montage - Make stunning mosaic photos or montage shape with tiles, which supports both JPEG and PNG files.
AppLock (FOSS) - A privacy App lock FOSS application.
Mosaic Creator - Mosaic Creator is professional mosaic tool. You can create your own picture mosaic.