The open-source movement has created powerful software that rivals commercial options. It offers free programs for various scientific needs like databases and statistical analysis. Open-source software is becoming a viable alternative for businesses and organizations. To be considered open source, software must meet specific criteria. The development approach of open source is compared to a bazaar, where diverse contributions lead to controlled progress. This model contrasts with closed, corporate-style development. The open-source philosophy emphasizes early releases and delegation of tasks.