AceThinker Screen Grabber Pro is a robust and all-in-one screen recorder software that can grab or capture your screen activity along with the audio playing on it. You are also allowed to record your voice by plugging a microphone which is necessary for tutorials, vlogging, or live stream games. It also features a built-in editor that allows you to edit or put annotations to the recording in real time. Try using this software and enjoy it.
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
Altarsoft PDF Reader - Altarsoft PDF Reader is a simple to use PDF files management program that allows its users to view PDF files, encrypt the files and even annotate these files as well.
Screencast-O-Matic - Free version Records up to 15 minutes, premium is $15/year.
eXPert PDF Reader - eXPert PDF Reader is a free to use PDF reader and views for the Windows operating systems.
OBS Studio - Free and open source software for video recording and live streaming for Mac, Windows and Linux.
Xodo - Try easy-to-use PDF tools that keep your documents safe. Work with your important files across all platforms and devices with the ultimate all-in-one document solution. Your productivity lives at Xodo!