I have one answer to this question: google keyword suggest tool/adwords. it depends what sort of market you're in and what you're doing. Because you're in thi

I have one answer to this question: google keyword suggest tool/adwords. it depends what sort of market you're in and what you're doing. Because you're in this forum, I assume you're building an internet app and intend on receiving traffic from search engines and social sites. You can use google keyword suggest or wordtracker to see how many people are searching for what you're making, and if anyone else makes it. Yes this works for ISV products too.