Marvel Cinematic Universe - Movie Selector
This web app by Thomas Rice allows the user to explore possible watch orders by selecting the movies they've watched.
MCU Bible Verse
This web app by Sean Lennaerts allows the user to search for any Marvel quote, and gives them the exact quote as well as formatting the quote with its timestamp as a bible verse.
MCU VIEWING ORDER
This google doc by Reddit users aaronp613 and Capn_Crotch lists every MCU movie, TV show episode, short, and even various non-canonical promotional pieces, in chronological order, along with their runtimes and a continuously up-to-date countdown to the next MCU release.