LongLiveSS - A clean way of saving screenshots at regular intervals
Loom - Loom is a screen recording extension for Chrome that gives people the ability to create and share media. Create your own videos using your camera, screen view, and audio. Read more about Loom.
Teampaper Snap - Take a snapshot, highlight key areas and share feedback
Kap - Kap is an open-source screen recorder built with web technology.
Nimbus Screenshot - Take screenshots and record video from your screen
Screencast-O-Matic - Free version Records up to 15 minutes, premium is $15/year.