As a developer, good ways to store those often-reused snippets of code that correctly solve a common problem is always useful. Now, there are other solutions to this problem, such as the Snipt API, which I covered previously, but Pastebin.com is the most often used, perhaps because it has beeb the favored place for notes from hacker group LulzSec. Pastebin has a nice, full-featured API, and is simple and free to use, at least at a basic level.
Twitter has added alt text support to Twitter Cards and the Twitter REST API. Alt text is an important piece of metadata for those who are visually impaired as screen readers and browsers use alt text to explain to visually impaired users the content of each image on a web page.