A corporate product site for a web based project management tool. i-lign wants to engage with its customers directly rather than through layers of consultants and resellers. Drupal is an important part of that, and will only get even more important to i-lign in the future.
The site has the usual brochure sections as well as a support knowledge base and forum for the user community. Plans are in the works for an Organic Groups based extension to the user community and online issue tracking via the Case Tracker module.
The sites theme is heavily customised to create the different sections and layouts. The knowledge base uses taxonomy extensively and i-lign created the Taxonomy Filter module for this.