https://github.com/tesseract-ocr/tesseract https://github.com/systemd/systemd
systemd have also written their own QL query: https://github.com/systemd/systemd/blob/master/.lgtm/cpp-que... https://lgtm.com/projects/g/systemd/systemd/alerts/?mode=tre...
(full disclosure, I also work at Semmle)