To create a flashcard revision set, all you need is to populate a Google spreadsheet and Publish via Flippity.
Textivate allows you to automatically create activities which encourage students to interrogate texts more closely, thereby improving their understanding. Copy and paste your text, choose from a range of activities, done!
Take an image having several points of interest. Set questions which require the user to click on part of the image to answer and there you have created your first Image Quiz.
Quibblo allows to create polls, surveys, quizzes (and even stories) you can share with the community, or just amongst your students.
And this is an example embedded quiz:
A well-featured and fully-rounded quiz environment, Yacapaca has thousands of questions already in its database, or author your own. Then distribute the quizzes to your students whilst Yacapaca does the marking and recording of the results, leaving you the important work of deciding your next steps as a teacher of those students.