A useful list from the SEO blog Coconut Headphones.
A search engine that returns results in the form of screen shots from homepages. Hover over one of the screenshots and it becomes larger. The idea is to make results visual. I like the concept, but I found my initial use frustrating. The results are displayed in groups of four, making it difficult to sort through many pages of results quickly. Via Free Technology for Teachers.
The search engine Web 2.0 created this interesting list of next-generation tools and websites. Via @lingsc.
An online database for searching trademarks. If you sign up, the site offers a notification service when it finds a trademark similar to yours. The service is free for one trademark. Via Techstore.ie.
Another trademark database. It also has the ability to search domain names, logos and disputes over names. Via Techstore.ie.