Tagalus is a web app that allows users to find definitions for #hashtags used on Twitter.

Features:

• simple web UI requires only entry of a #hashtag to search for definition
• definitions displayed are user-driven
• ability to comment or add definitions
• displays relevant Flickr and YouTube hits for the selected #hashtag

The Good:

Tagalus is a great tool to find out what all those #hashtags mean. It is easy to use and allows users to comment on existing definitions or add their own. You can create #hashtags and submit a definition too. Tweets using the selected #hashtag are displayed, and it is interesting to see any Flickr photos or YouTube videos that are related to the tag as well. Tagalus also offers a bookmarklet which allows users to search text selected from any web page they happen to be visiting.

The Not-so-Good:

We found nothing to complain about regarding the functionality of Tagalus. The only thing we could find to complain about is the appearance of the site, which is perhaps a little drab or ordinary (mostly a white field with few blue accents). As we said, none of that impacts on functionality, so who cares? It’s just a style thing, nothing more.

Tweetwave.com rates it: ★★★