There are various types of fonts for these applications. The fonts released by the company have their own installers and they're automatically added to the program using the installers. For the rest of the fonts, the procedure is quite simple.
Download and extract the TTF files to a place on your desktop. Then press Windows key + R and type fonts. Drag and drop the files from the desktop folder to the Fonts window. Wait for installation to finish and restart your applications. Type something, then click the Edit window and select SYSTEM Fonts. Type the name of the font and that's it.