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.
Wondershare PDFelement - All-in-one PDF editor
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
Foxit PhantomPDF - Edit PDF files with our feature-rich PDF Editor. Download Foxit PDF Editor to convert, sign, scan / OCR & more. A speedy PDF Editor alternative to Adobe Acrobat.
Screencast-O-Matic - Free version Records up to 15 minutes, premium is $15/year.
Google Docs - Create a new document and edit with others at the same time -- from your computer, phone or tablet. Get stuff done with or without an internet connection. Use Docs to edit Word files. Free from Google.
OBS Studio - Free and open source software for video recording and live streaming for Mac, Windows and Linux.