highlight.js - Highlight.js is a syntax highlighter written in JavaScript. It works in the browser as well as on the server.
Twishort - Twishort is a best Twitter app for writing longer tweets. Tweet more than 140 characters
code-prettify - Code Prettify is an embeddable script that makes source-code snippets in HTML prettier.
Privatter - Privatter is the easy way to share long texts and pictures set limit on your followers. You can post them by Sign in with Twitter account to this site.
Apache Tika - Apache Tika toolkit detects and extracts metadata and text from different file types.
5Tweets.com - Type a long tweet and 5Tweets will rewrite it into multiple tweets with a tweet count.