CrunchBase is a product of TechCrunch and is a great resource for listing your business, startup or web app. The business directory is very cleanly designed and easy to flow around, and if you take a peek at a business listing you’ll notice you get a do follow link. CrunchBase is not a free for all, you have to be a related company and go through a reviewing process. It is completely free which is great, you get the link from a very authoritative site and the chance to attract some business or capital.
If you’re a consultant or provide services you’ll be happy to know you can add your services to CrunchBase, as well make your own personal profile which links back to your service or company. Person profiles also include the luxury of a link, as well links to your social media pages which helps give them some extra juice.