There are many tools out there to help improve the productivity of your work. You don't have to be a developer to appreciate the usefulness of some of this software.
ShareX is a great screen capture app. It can not only capture screen but can capture video of your screen as well.
NotePad++ is one of the great editors. It loads up fast and is saved in a text format that can be edited by most text editors. When you don't need the fancy Word processing type formatting, then this is the editor of choice.
WinMerge is a great tool to compare documents, files....etc.
IrfanView For basic Graphics manipulation.
7zip is An all-around tool for compressing and decompressing multiple compression file types. You won't be disappointed it what it can do.