Consider adding tags or categories

[donmccurdy]

Would be nice to be able to link to URLs like:

• /tagged/controls
• /tagged/loaders
• /tagged/animation

[ngokevin]

Would be nice once there are more than a handful of categories/tags. Else it'd just return one or two for each. A client-side full-text search and indexer would be helpful though. Haven't had time to curate though.