https://github.com/irods/irods/milestones - Issues to be addressed in each release are tracked on GitHub.
https://github.com/irods/irods_development_environment - Docker-based development environment
C/C++ - Doxygen
REST (via C++) - https://github.com/irods/irods_client_rest_cpp
REST (via Java) - https://github.com/irods-contrib/irods-rest
R (via REST via Java) - https://github.com/irods/r-irodsclient
https://github.com/irods/irods/issues - Every bug and feature are tracked. Every commit is related to an outstanding issue.
Travis - Travis-CI is providing continuous building for every commit.
Jenkins - Jenkins provides developer-local testing.