Dopplr makes your travel planning smarter.
Share your personal and business travel plans with the people you trust. Notice coincidences when your travels overlap.
Poyozo gives you your own data back by downloading the information you're currently giving to the web on to your own computer. You can opt-in to importing your data from Facebook, Twitter, Foursquare, Last.fm, Google Calendar, any email service, any RSS feed, Flickr, Wesabe, Listit, Skydeck, Dopplr, your Firefox browsing history, the local weather, and your location, allowing you to access all of this personal data as easily as the companies that run these services can.