If you’re thinking about creating a web app–whether as a business or to use in your existing business–its construction costs and time can run the gamut. It depends on many factors: how complicated the technology is, what tools you use to build it and so on. But details aside, here are a few web app entrepreneurs who show us it can be done.

Iotum Calliflower

Founders/ages: Alec Saunders, 45; Howard Thaw, 52
Launched: June 2008
App: A meeting tool that bridges businesses and social networks to allow the planning of and participation in interactive conference calls
Why it works: The solution is all-encompassing: It combines high-quality audio conferencing, scheduling, file sharing and collaboration in an easy-to-use interface.

via Yes, You Can Build Your Own Web App – Entrepreneur.com.