Always test your site in many browsers, so go with crossbrowsertesting.com.
Another firm is http://xhtmlweaver.com, I have never used them.
- zurb.com, a bit more expensive but they’ve worked with tons of startups.
- A ton more web design firms
- CrowdSpring, personally I have never used them.
Some design firms I haven’t tested out:
This is a great place to find stock photos for you sites
MS Windows editors:
- gomockingbird, one of the best wireframe tools ever.
- CSS Cleanup Tool
- HTML Cleanup Tool
- Blueprint CSS Framework (e.g. Example)
Firefox development plugins:
- Add N Edit Cookies
- DNSStuff Toolbar
- Netcraft Toolbar
- Html Validator
- Server Switcher
- Total Validator
- View Cookies
- Web Developer
- IE Tab
- Page Speed from Google
- HttpFox, to view GET and POST data from HTTP requests
- Fiddler, to view GET and POST data from HTTP requests
Google Chrome plugins: