Google Summer of Code has been a great program for ZAP and has led to many key features being developed.
Advice and Guidance - How to take part
2024 - Unfortunately ZAP was not selected as a mentoring organisation
2023 - Browser Recorder and Postman Support
2022 - Param Digger
2021 - Out-of-band Application Security Testing, Retesting Alerts
2020 - GraphQL Support
2019 - Scanning websockets (phase 2)
2018 - Authentication helper and Scanning websockets (phase 1)
2016 - Bug tracker support
2014 - Advanced fuzzing, SOAP scanning, Advanced Access Control testing
2013 - BIRT Reporting, Zest enhancements, Enhanced HTTP Session Handling, SAML 2.0 support
2012 - Ajax Spider, Crawler redesign with session support, WebSocket testing