Google Drawing: Collaboratively draw and create graphics with everyone in the world, or just the people you invite. An example is here, where we’ve overlaid some graphics onto an image. It’s open to the public, so feel free to play! FREE
Design
Inkscape
Inkscape: An open source vector graphics editor comparable to Adobe Illustrator. Inkscape can be used to create anything from graphics for websites to images ready for large format printers. FREE.
Easelly
Easelly: Similar to Piktochart, Easelly has ready-to-use templates. You can drag and drop images and designs to use in your infographic, edit text directly on the web page, and add charts. Export options include high quality .jpgs and .pdf. FREE/PRO
Piktochart
Piktochart: An “easy-to-use infographic creator,” piktochart offers over 100 ready-to-use themes. Once a theme is selected, you can edit the text, insert multimedia elements, and replace images. Free accounts have no usage limits; pro accounts have more templates and export functionalities. FREE/PRO