Gerrit is the tool LibreOffice developers use for code review. This is where developers submit and review patches.
TinderBox present the result of the many, many tinderboxes that build Libreoffice all day and all night.
LibreOffice has a Continuous Integration system, runnig gerrit verification jobs, tinderboxes and all sort of other task.
Bugzilla is the tool for LibreOffice developers, QA and users to submit, triage, handles bug reports.
LibreOffice has a Wiki where you can find a trove of information. It is a wiki, so help organize and keep the content up-to-date.
OpenGrok is a source brower, that allows you to do search on the very large LibreOffice code base.
The Online help for LibreOffice contains the end user documetation for Writer, Calc, Draw, Base, Math, and Basic.
You will find the documentation and examples of use of the API for Universal Network Objects (UNO).
LibreOffice operate a Weblate server with which we manage the translation of the product in many languages.
We run a set of Callgrind Performance tests. the result of which are presented graphically on there.