The goal is to recognize and reward proactive security improvements to third-party open-source projects that are vital to the health of the entire Internet. Android Open Source Project, Apache httpd, lighttpd, nginx are among those eligible for rewards. Google is adding the following to the list of projects that will receive rewards. For more information about eligibility, reward amounts, and the submission process, please visit this page. The program is open source. The financial incentive that your team would provide has great potential to advance.”]
Source: https://security.googleblog.com/2013/11/even-more-patch-rewards.html