Foto Stitch app allows you to do many variations and combinations with your photos. Some of the cool things you can do include the following;
1) You can overlay two photos on top of one another and create a blend of both photos
2) You can mirror photos, simple provide one photo and get 4 different combinations of mirroring.
3) You can create 17 different types of collages, enough to have fun with
4) You can also add a text overlay to your photo, you will get a chance to change the Font style, font color, and font size for the text.
5) You get the option to crop the photo before you use them and you can also rotate the photo.
6) Once you are done with the photo simply save it and it will be saved to your iPhone cameral roll.
More features will be added.