Slideshare - Get the credit and audience you deserve for your presentations!
Scoop.it - A stellar social bookmarking service that is being used by a ton of teachers right now.
PlanBoard - It’s an online lesson planner made for teachers. Create, share, and manage lesson plans with simple and easy to use lesson plan templates.
Evernote - It’s insanely popular in education and useful for teachers, students, parents, and just about anyone who wants to remember what they’ve done.
Dropbox - I use Dropbox every day. I had to up to the 100GB size and feel like I’ll never fill it up. Great for backing up everything, accessing files remotely (even from your smartphone and tablet) and sharing things. I’ve seen it used for handing in homework on a regular basis.
Via Shona Whyte