"PicCollage is one of my favorite Android and iPad apps. It is a free that allows you to quickly arrange pictures, video, text, and stickers into collages. From the app you can share your collage to Google Drive, Instagram, Facebook, Dropbox, and many other file sharing services. In the video below I demonstrate how to use it without creating a PicCollage account."
From Robin Good: Beeclip EDU is a web app which allows anyone to easily combine images, video and texts to create instructional scrapbooks, moodboards, collages or portfolios.
Images can be easily searched and imported via Google Images and Flickr, and text can be easily added in a number ways. Visual objects can be positioned and personalized on the page and final scrapbooks can be downloaded or printed.
Free to use. Can be tested without registering.