For WDL questions, see the WDL specification and WDL docs.
For Cromwell questions, see the Cromwell docs and please post any issues on Github.
Announcing the WDL Blog!
WDL-away your day with us on the WDL blog! These blog posts will be geared towards developers who are looking for the nitty-gritty-codey details of WDL and Cromwell, such as new backends, parameters, etc. We'll post about new WDL documents and Cromwell releases, as well as other technical topics.
And don't forget to follow us on Twitter!