Best websites for Startup web design companies

Image Editors

http://www.pixelmator.com/
http://gimp.org/
http://splashup.com/

Feedback And Usability Testing

http://www.conceptfeedback.com/
http://fivesecondtest.com/
http://www.feedbackarmy.com/

Color Tools

http://www.colourlovers.com/

http://kuler.adobe.com/

Billing, Invoicing And Time-Tracking

https://www.freshbooks.com/
http://invoicemachine.com/home
http://www.billingsapp.com/
http://curdbee.com/
simplybill.com
ituit.com
http://www.simpleinvoices.org/
http://www.cannybill.com

Fonts:
http://www.fontexplorerx.com/
http://www.linotype.com/

Files:
http://www.getdropbox.com/

ross-Browser Compatibility

http://litmusapp.com/pricing
http://browsershots.org/
http://www.parallels.com/

Local Testing ↓

http://www.mamp.info/en/mamp/index.html

Coding & Programming

http://www.barebones.com/products/TextWrangler/
http://notepad-plus.sourceforge.net/uk/site.htm
http://macromates.com/

Images and Photos

http://flickr.com/
http://deviantart.com/
http://www.sxc.hu/

Project mangement

http://www.morguefile.com/

http://actionmethod.com/

Tools For managing money

lessaccounting.com
mint.com
tickspot.com
slimtimer.com

Client Management tools:
BAsecamp.com
Zohowritter
bigcontract.com

Time Management Tools:

Google calender
ta-da list
dejel timeout


External resources

http://sixrevisions.com/tutorials/web-development-tutorials/coding-a-clean-web-20-style-web-design-from-photoshop/