Facetune - Facetune is a fun and powerful portrait & selfie photo editor!
Imgur - Imgur is a free and simple image hosting service with image editing feature. Signup is optional.
Adobe Photoshop Mix - Cut out and combine images, change colors and enhance your photos on mobile.
Img Safe - Host JP1G, GIF and PNG images up to 16MB each.
CreamCam - CreamCam called itself a selfie filtering application but offers a portrait enhancement features and tools to its users.
Picorator - Picorator is a simple yet powerful image sharing application developed by online communities.