I just heard (on Twitter) about a great new tool - Mapnificent - for transit users like me. Type in an address, pick a time estimate, and you'll see how far you can go in that time on your local transit system.
So, just to compare, here's what I can get to from Bow Cliff Seniors in 15 minutes:
And here's what I can get to from my neighbourhood in 15 minutes:
Of course, this is an estimate and doesn't take delays/etc. into account. Still, I can see it being a useful tool for trip planning when thinking about changing work/home locations, for nonprofits thinking about where to locate in relation to clients, etc.
(Cross posted at Witch-Ways, where I've been crafting magic on the internet since 1994.)