Free tools for screen capture

Some tools for screen capture for Windows:

Chrome addin from Snagit


Free addin for MS powerpoint:  https://mix.office.com/en-us/Home

Reviews:

http://www.pcworld.com/article/2836252/office-mix-now-lets-powerpoint-users-create-on-the-fly.html
http://www.edtechroundup.org/reviews/office-mix-powerpoint-gets-interactive