Conference for Open Source Coders, Users and Promoters (COSCUP) is an annual conference held by Taiwanese Open Source community since 2006. It's a major force of Free software movement advocacy in Taiwan. The event is often held in two days, with talks, sponsor and communities booths, and Birds of a feather (computing). The chief organizer, staffs, and speakers are all volunteers.

COSCUP aims to provide a platform for connecting Open Source coders, users, and promoters, and to promote FLOSS with this annual conference. No matter if you are an Open source coder, a devoted promoter, an enthusiastic user, or just a newcomer - We welcome you to be part of COSCUP!