Digital Point has a great webmaster tools section. Most prominently it has a number of very useful tools for working on your search engine optimization. The full list of tools:
Google AdSense Charts, Google AdSense Sandbox, Back Link Tracking Tool, Coop Ad Network, DNS Zone Transfer, FileMaker Pro Web Digger, FileMaker Database Server Probe, Keyword Ranking Monitor, Keyword Suggestion Tool, PageRank Toolbar For Mac, Add Search Functionality To Your Website, Free Web Counter, Website To Country and Yahoo! Web Rank Tool.
Any webmaster will be able to find something useful at this site.
I have been using the back link tracker for some time and find it very interesting. The tools for the most part are simple to use, so go take a look.