You’ve installed a bunch of plugins. Many of them provide Shortcodes. Are you able to hold all of them in your head? This neat Code Snippets adds a meta box on top of the right sidebar of the post screen to show you a list of all available Shortcodes. As it makes use of default WordPress admin meta boxes the box can be closed to save space and opened when needed to take a look at the Shortcodes.
Show a list of available Shortcodes
WORDPRESS CODE SNIPPET