20 great tools for helping you develop web applications

Site:
http://onemonthapp.com/archives/2007/10/21/20-tools-for-web-application-development (OneMonthApp.com)

From the site:

One of the main reasons we started the One Month App is because people always seem to be interested in our development process. One of the aspects of our development process is naturally the software and tools we use. The following is a list of the tools that we have used on this project and others, covering our full technology stack that includes desktop, hosted and server applications. We would be very interested to hear about any tools that you use in your development process as well.

Some of the programs listed:
Ruby on Rails
Adobe Creative Suite
BaseCamp (awesome collaboration software)