The best alternatives to Artifact Uprising are IFTTT, Printed, and MeshCanvas. If these 3 options don't work for you, we've listed a few more alternatives below.
Juxtaposer is an iOS app for easily combining multiple images into funny and/or artistic photomontages. The new Magic Crop feature just added in version 4 uses a Machine Learning model to let you cut out an element from an image in seconds.