Last fall, I began working on a browser plugin to crowd-source image descriptions of social media (and other web) images to aid visually-impaired people browsing the web. I finally got enough ducks in a row on that project to make big strides over the last two weeks.
The plugin is available for Chrome, right now, and Firefox, as soon as it gets approved there. I have tested it without screen-reading assistance and with VoiceOver on Mac OS X. I have plans to test it myself with NVDA, JAWS, and Window-Eyes on Windows, and Orca on Ubuntu. But, there is only so much good that testing myself can do (especially since I am a complete novice with a screen reader).
It is at a point now where I'd like to open it up to a few people for feedback before going completely public. If you're a sighted person who wouldn't mind transcribing memes or a visually-impaired person who wouldn't mind lending an early hand in this endeavor, please send me an email /email@example.com/, and I will point you to the documentation on how to install and use the plugin.