Shape Collage is a nifty free utility available for PCs, Macs, and Linux. There are limitations to the free version - most notably, you can't save save & reopen projects (click here for the list of features available in the $25 Pro flavor) - but it's super easy to use and the results are fantastic. Highly intuitive, the menus are simple to navigate, featuring clear options incorporated into a well laid-out workspace. It just feels natural, encouraging you to try different settings to see the result. This YouTube video does a terrific job explaining the program and its features. It's absolutely worth the download to explore for yourself.
A sixty-day experiment documenting classroom life in the Cloud: two Northfield Community School (NCS) fourth grade teachers (Mrs. Shenkus & Mrs. Gibson) explore the use of Google Chromebooks across the curriculum.