BCC is Bingo Card Creator (http://www.bingocardcreator.com/). It's patio11's business, a tool for schoolteachers to easily create bingo cards for their classes. It's not sexy, but it's enabled Patrick to quit his job as a salaryman and work exclusively on his own projects. He's more concerned with profitability than with his (or his businesses') image, and here, he's saying that a big / complicated app isn't necessary for a business to be successful.

Bingo Card Creator http://www.bingocardcreator.com/

Don't know what that means too :)

It would also be nice if you know any other small apps that are successful out there.

Actually, the sample size is not one. The sample size includes projects like the failed massive technology upgrade of the FBI systems done by none other than SAIC (where the 'S' stands for Science) or the giant DMV fiasco in California trying to upgrade their records to an Oracle relational solution, abandoned after very large expenditures.

The sample size is very large and includes lots of failures. Many of the failures have very large code bases.