D3 Cloud is a Wordle-inspired word cloud layout written in JavaScript. It uses HTML5 canvas and sprite masks to achieve near-interactive speeds. This layout requires D3. It’s similar to d3.layout.force, in that it’s asynchronous and stateful.

The layout algorithm itself is incredibly simple. For each word, starting with the most “important”: Attempt to place the word at some starting point: usually near the middle, or somewhere on a central horizontal line. If the word intersects with any previously-placed words, move it one step along an increasing spiral. Repeat until no intersections are found.

Requirements: D3 Framework
Demo: http://www.jasondavies.com/wordcloud/
License: License Free