Instagram users constantly face one dilemma: having too many photos to share and not wanting to flood their friends' feeds. The solution? Photo collages. While there are numerous apps that offer collage layouts, for some you'll have to pay (no, thank you) and others, although free, look kind of . . . cheesy. We tried out several apps and narrowed it down to the ones that offer the best layouts and special effects for a collage you won't be embarrassed to share.