tajapa was the logical progression from the development of cellcast.

Now that we knew how to handle VOIP calls and had a partner to do the interconnection business with the big carriers, we decided we wanted a least cost routing system.

The name tajapa was designed to be typeable on a mobile device, an idea almost antiquated by now ;-}.

On a simple website the user could, after registration, enter phone-numbers and tajapa would provide her with local phonenumbers to call. So everyone could call a cheap local number and then be connected to otherwise expensive numbers elsewhere in the world.

The service was used in private beta for about 6 months before we closed it due to overwhelming competition through

http://jahjah.com
http://rebtel.com
http://grandcentral.com

In spring 2006 i started playing around with Asterisk the Open Source PBX. I connected it to one of the unused ISDN lines at the office and in the evening i had a quick and dirty first version of a podcast via phone production system.
In order to provide multiple concurrent lines we partnered with effringo, a SIP provider enabling company.

In the days to follow i refined that to a service that i called cellcast. The first ever cellcast was recorded on Montmartre on the night the Brazilians kicked the French out of the soccer world championships.

Once it was live, we sent out a press release via hundertelf and the response was overwhelming. I especially remember one morning when i came to work and i found an email from a big german VC in my inbox with only two sentences: "I heard about you. Do you need money?"
We didn't.

The german hockey-federation adopted the service very quickly and started reporting from every game through all leagues.

In 2008 i added an open API and during the barcamp at burda i showcased the API by developing a twitter/cellcast mashup.

http://cellcast.de
http://effringo.de
http://tweetalk.com
http://xsoo.org

In fall 2003, just after i had founded hundertelf, we won the pitch for creating a social network/platform for the german ministery of family affairs.

It was supposed to be targeted at people between 10 and 16 years and its purpose was to create a safe environment in which the users could explore the use of platforms like this without the risk of harassment of data theft and the like.

On the project managers list was about everything you find on facebook these days.

In order to start small and slowly evolve into a full fledged social network, we decided to develop a framework on the LAMP -Stack and release it as an open source product once we were done with the initial development. At the time MVC frameworks were rare. Today we would have chosen ZEND, RAILS or SPRING, depending on the language of preference.

OOS is the result of this effort.

http://xsoo.org
http://netzcheckers.de
http://hundertelf.com

Sevenload

http://de.sevenload.com/sendungen/Marketingberater-2-0/folgen/BfAzG0j-Barcamp3-Special-Thomas-Schindler