Based on our record, ShareX seems to be a lot more popular than Screencastify. While we know about 271 links to ShareX, we've tracked only 1 mention of Screencastify. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
ShareX (https://getsharex.com/) doesn't have quite this nice UX but it's free. I often use it alongside browser dev tools. Here's a screenshot of me measuring this comment box https://i.imgur.com/yoTHbzq.png. - Source: Hacker News / about 2 months ago
ShareX will run on that machine no problem. Open-source & free. Https://i.imgur.com/KQAoDin.jpg. Source: 5 months ago
ShareX [1] is my other "must install" app. I never would have guessed how much my branch of engineering consists of "take a screenshot and draw lines, arrows and circles on it." Being able to customize my workflow to do all of that is really great. [1] https://getsharex.com/. - Source: Hacker News / 8 months ago
ShareX - The best free and open source screenshot tool for Windows (getsharex.com). Source: 10 months ago
Incase you are having a hard time with sharing screenshots use this https://getsharex.com/. Source: 10 months ago
Screencastify is another one which is an extension but is avaliable in a lot of plaltaforms screencastify.com. Source: over 2 years ago
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
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.
LightShot - The fastest way to take a customizable screenshot.
Snagit - Screen Capture Software for Windows and Mac
Camtasia - Camtasia 2018 makes it easy to record your screen and create polished, professional-looking videos.
OBS Studio - Free and open source software for video recording and live streaming for Mac, Windows and Linux.