Today at The Next Web conference in Amsterdam, start ups from around the world are launching timeline apps, including donation site JustGiving (U.K.), travel planning site Tripbirds (Sweden), premium television site Canal+ (France) and mobile video editor app Magisto (Israel).

Since timeline apps began launching four months ago, developers have been growing their businesses internationally by building social web and mobile apps. Last month, there were about one and a half billion shares from Spotify (Luxembourg) to Facebook. Also, in the past month, Deezer (France) saw a 300% increase in traffic from Facebook mobile and growth of 200,000 new Facebook users per week.

These start ups continue the momentum of game developers like Wooga (Berlin) and King.com (London) who grew to reach tens of millions of users after building their businesses on Facebook, each hitting the top 5 list of game developers on Facebook in less than a year.

Wooga reaches more than 45 million users each month through mobile and Facebook.com games like Diamond Dash, and King.com recently hit 42 million monthly active users (10 million come back daily), with games like Bubble Witch Saga.

Similarly, U.S.-based start ups grow globally through Facebook Platform:

• Fab.com: One month after launching its timeline app and doubling its referral traffic from Facebook, design marketplace Fab.com acquired Casacanda, a top flash sale site that served Germany, Austria, and Switzerland. Since the acquisition and launch of Fab.de, Fab.com’s German site has grown to 500,000 users, adding 300,000 in just the 40 days.has 500,000 users, having added 300,000 over the past month, and revenue per month is up by over half a million euro.

• Gogobot: The social travel site recently launched its first office in London to keep pace with its rapid user growth. In the three months since launching its timeline app, Gogobot’s user base has grown by more than 50%, with nearly 45% of that growth coming from the top economies in Europe.

For a full list of timeline apps featured at The Next Web conference today, visit the Facebook Developer blog. You can also find more timeline apps here.