Sketch Cloud - Upload Sketch documents and share them with the world
Artboard Studio - Online graphic design app mainly focused on product mockups.
PIXELIXE Studio - Pixelixe makes it easy to create and edit any type of online graphics. For social media, blogs, ads, and more!
Canva - Canva is a graphic-design platform with a drag-and-drop interface to create print or visual content while providing templates, images, and fonts. Canva makes graphic design more straightforward and accessible regardless of skill level.
Snappa - The perfect graphic design tool for digital marketers.
Marvel - Turn sketches, mockups and designs into web, iPhone, iOS, Android and Apple Watch app prototypes.