Hydra is a documentation framework that bases on top of established Linked Data (Semantic Web) tools to build the next generation of connected Web APIs. The team of developers in the HTTP-APIs community aims to establish an ecosystem of tools to make Hydra framework operational. A list of tools under development can be found at this link.
Hydra Ecosystem promotes and facilitates the adoption of Hydra.
For a general introduction you may want to follow the index:
- Getting started