The Twitter Text Ruby Library by Twitter provides text processing routines for Twitter Tweets which unify the various auto-linking and extraction of usernames, lists, hashtags and URLs. This library is written in Ruby.
The Gnip Audience API now features Twitter aggregate user age information. The Gnip Audience API includes nearly one dozen demographic models including gender, interests, TV genre, TV show, language, etc. User age is the newest addition to the set of Gnip Audience API demographic models.