In libreoffice we have a very active development (among others) community.
source Active stat
259 people (or to be exact “nick”) visited our IRC development channel (connect via web chat). A lot of these people are developers who want to help, and have questions about how to solve a problem.
Come and join us, except for the weekends, this is one of the best places to get your development questions answered (remark, we only exceptionally answer user questions on this channel).
If you are new, and want help to get started, have a look at: Get involved