The Marvel/Avengers Roleplaying & OC Creation Resource Kit
I've created and found a lot of resources that are pretty handy for, or are even aimed at (or in the general direction of) Marvel/Avengers roleplayers, particularly those who create OCs, so I figured I might as well put links to all of 'em on the same page for easy access.
Things I Made
A Few Things To Remember To Improve Your Marvel Characters, Roleplays, & Fanfics
Some pointers and things to keep in mind to create more believable characters and scenarios.
Character Creation & Development Theory (Or, How To Make Characters 101!)
Some basics to keep in mind.
Tips For Making Avengers (And Other MCU/Earth-199999) OCs
Some tips to make better Avengers and MCU-related OCs in general.
Tips For Making Asgardian OCs (And OCs From Other Realms, Too) For Earth-199999
Make better and improved OCs from Asgard and the other realms.
Common, Yet Terrible Character Descriptors - And How To Fix Them (And Write Better Descriptions In General)
If you want people to respond well to your OCs, you need to be able to present a good pitch. Get some pointers here.
Common Problems In Roleplaying Characters
Frequently-seen problems amongst roleplaying characters these days.
Character Development Questions
Questions to help you develop your characters.
Television Drama Name Generator
Assuming your character is from the US, this will take care of the better part of your naming needs.
The Astonishing Adventures of Citizen Mask Name Generator
Get names suitable for characters who are supposed to be from the "Golden Age" era (IE, the 30s and 40s).
Asgardy-ish Name Generator
Is your OC from Asgard? Try this.
Basic Character Appearance Generator
Get a random basic set of looks.
Tricks & Tips For Naming Superheroes & Supervillains
In case your character needs more than just a civilian name.
Superhero & Supervillain Name Origin Generator
A tool to help you figure out what your character's superhero/villain name should be.
How You Got Your Superpowers
Generate a snippet of backstory explaining how your character got xir powers.
Yet Another Superpower Generation Tool
A method to come up with powers for superheroes and supervillains using dice.
Random Superpower Generator
Randomly roll up some superpowers.
Magical & Weird Science Effects Generator
Come up with weird and wild effects for objects and serums, or just use the effects it suggests as superpowers.
Useful for helping you develop and define your character's superpowers.
Character Detail Generators
Randomly come up with all sorts of useful things - flaws, motivations, interests, etc.
Quiz: What Kind Of Superhero Would You Be?
Take this quiz for your characters and OCs to help you determine which kind of superhero they'd be best suited for being.
Tips & Ideas To Make Better & More Interesting Powers
Some tips and pointers for getting you started on creating your superhero or supervillain OC's powers.
Location of Stark/Avengers Tower on Google Maps
Same place as the MetLife Building.
Location of Stark/Avengers Mansion on Google Maps
Same place as the Frick Collection.
Location of SHIELD's Manhattan office on Google Maps
Located in the Morgan Stanley Building on 1585 Broadway. Also, street view of the door Steve Rogers ran out from.
Location of the Triskelion on Google Maps
On the southern end of Theodore Roosevelt Island in Washington DC.
Location of Stark Expo 2010 on Google Maps
The expo was held in Flushing Meadows, Queens.
Marvel Universe Wiki
Marvel's official wiki. Useful for looking up characters and such.
A fan-run wiki, also very useful.
Marvel Cinematic Universe Wiki
A wiki dedicated to the Marvel Cinematic Universe.
Marvel Cinematic Universe Wiki (another one)
Another wiki dedicated to the Marvel Cinematic Universe.