PhotoGrid - Picsart removed a lot of grid options from its collage feature, and limited the amount of pictures to 10. While this app is inferior to Picsarts quality, it lets you choose max 15 pictures and has numerous layouts.
Pixlr - Pixlr® makes it easy to transform everyday images into stunning works of art.
Acapella from PicPlayPost - Acapella from PicPlayPost developed by Mixcord Inc.
Photoscape - high quality photo editing software, that enables you to fix and enhance photos.
Brillar - Bring glitters, stars and sparkles to your videos and photos.
Adobe Photoshop Express - Easily edit and share your photos in no time!