"Wink is a Tutorial and Presentation creation software, primarily aimed at creating tutorials on how to use software (like a tutor for MS-Word/Excel etc). Using Wink you can capture screenshots, add explanations boxes, buttons, titles etc and generate a highly effective tutorial for your users.
Here is a sample Flash tutorial created by Wink."
"Provide Personalized Feedback
Capture the documents or presentations your students are working on, add feedback, and easily share with your students for review wherever they are.
Keep Everyone in the Loop
Take a quick capture of a paper or project your students are working on, add notes, and send to fellow teachers, parents, or the entire class.
Utilize Your Google Drive™
View, mark up, and manage your captures anywhere, thanks to the deep integration Snagit for Google Chrome™ has with Google Drive™."
Pixlr Grabber
Grabber 0.5 for Chrome
The Chrome extension lets you capture the whole or parts of the browser content (Print screen), edit, share or save direct in the browser.
Grabber 2.0.3 for Firefox
Grabber for Firefox let you right click on any image in a webpage and load it into pixlr for editing. The firefox add-on also lets you capture the whole or parts of the browser content (Print screen)