WPTeX is a small php program that you can easily install in your wordpress blog, to easily generate a TeX file, so you don't worry about learning LaTeX!
Twitter Tools This plugin creates an integration between your WordPress blog and your Twitter account. Pull your tweets into your blog and create new tweets on blog posts and from within WordPress.
WhoLinks2Me.com is an incredibly useful tool for finding out who links to your website or blog. With Snap Preview Anywhere, you can not only read who links to you, but see them as well!
Use this tool to find your Flickr userid or groupid number. Just enter the address of your photostream or group pool and it'll find the number for you.