Here is favorite list of Web Tools must have for Web Development
Speed test any pages in your website. Best rating is an A. B is acceptable but not D or worst an F.
The DMV of the web. FInd out if a website domain is available. Search the nameservers or the hosting account of any domain. You will need the nameservers to show the domain registrar where to point your domain.
Don’t have Photoshop. Then try this free online app for photo editing. I used both Pixlr Express and Pixlr Editor. They are amazing photoediting tools.