HappyFiles is a great alternative to WP Media Folder (another favorite)! It’s lightweight and allows you to set multiple categories to not just images, but posts and pages as well. There’s a free and a pro version, definitely check it out!
Resource Category: WordPress Plugins
For all the wonderful things WordPress does, they have seriously dropped the ball when it comes to how it handles media. But worry not, WP Media Folder is here to make your life easier by allowing you to organize all of your media into folders. This is the best money I’ve ever spent on a plugin.