1. 80+ Free 2-Column Website Templates - I'm a web designer and this is a great source for inspiration. Yup, I admit it, I've been to the point where I just can't get a move on a project due to the lack of a mind spark. Scrolling through this post gets my creative juices flowing in no time.
3. 50 Great Widgets For Your Blog - These are all great widgets for your blog. Keep it in mind though, it's great to have a few widgets on your blog, but don't overdo it. Choose the most relevant ones for your sites content and practice moderation.
4. 30+ Tools to Turn Wordpress into a Personal Hub - Although I'm using Blogger, I won't deny that Wordpress is a great blogging platform. It's very flexible and easy to use. These tools allow you to make your Wordpress blog into a virtual souped-up social network profile page. In this case, contrary to my advice for #3, I'd say go all out with the add-ons and have fun.
5. TWITTER TOOLBOX: 60+ Twitter Tools - By itself, Twitter is a simple microblogging tool. With these add-ons and tools however, Twitter becomes a messenging powerhouse. I personally didn't get Twitter when it first came out but as these tools slowly trickled out I realized that you control how powerful it can become.