Cockroach University offers a free course, "CockroachDB Query Performance for Developers," designed to help developers improve their applications' query performance and functionality. The self-paced course covers topics such as analyzing query execution plans, adding indexes, optimizing sorting performance, and efficiently querying fields in JSON records. It includes nine videos, eleven hands-on labs, and a final exam with a Certificate of Completion upon passing. This course is suitable for developers, database administrators, system architects, and others involved in the application development process.