This blogpost gives step-by-step instructions for how to use Google forms for short, multiple choice quizzes.
With www.tinyurl.com, you can create small URLs that are easily accessible to students
Similar application: Crocodoc - Share and Mark Up Documents
Using Google Alerts to Enhance Research on The Writer in Me blog.
How to Track Topics with Google Alerts on the Free Technology for Teachers blog.
How to Add Pages to Blogger Blogs on the Free Technology for Teachers blog.