We're excited to release 0.21, the first release with Stencila Sheets and the biggest release so far: 590 commits over 232 files! Read more about what sheets are in the introductory blog post (that of course is actually a stencil with the Substance-based front end introduced in 0.19).
See the builds page for recent builds of the R and Python packages and Docker images, including for 0.21, or build your own binaries.