ENDOMONDO

I used it before I got my Garmin.  Pretty much does the same thing but adds stuff like posting to social networks, etc.  I only used the free version though.  Polar makes a HRM that works with your phone, but It doesn't work with the regular Polar stuff.  I never got the HRM.

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I used Endo Free for over a year before I uprgraded to Pro. It was worth the upgrade, and made GPS tracking easy. Since I had a smartphone, it was also cheaper than buying a new GPS. The big thing I get it the ability for others to track my progress. My wife and parents like to see where I am at in a workout, and then send encouragement. Oh yeah, and it is cool to know how many times you have ridden, run, or swam to the moon.