OBS Studio (also known as Open Broadcaster Software, or OBS) is a screen-casting and live-streaming software available across multiple platforms including macOS, Windows and Linux. Boasting features typically only found in commercial screen recording apps, OBS also provides one of the simplest workflows with an intuitive and easy-to-learn interface that makes recording and streaming a breeze. It's also totally free and open-source.
- I installed OBS. It simply records the display, but doesn't allow any annotation and several other features that Camtasia Studio, FlashBack and others provide. Its purpose is different, since it is a broadcasting software.
- Very fast screencaster, tons of features, but not so straightforward, 100% free!
- at least do not have problems i had with other tools