ShareX - ShareX is a free and open source program that lets you capture or record any area of your screen...
Scrivener - Scrivener is a content-generation tool for composing and structuring documents.
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
Final Draft - Use your creative energy to focus on the content; let Final Draft take care of the style.
LightShot - The fastest way to take a customizable screenshot.
Trelby - The free, multiplatform, feature-rich screenwriting program!