Here are some pieces contributed by others that haven't made it into uvtool
proper yet. They may change or disappear between releases.

Additional architecture support:

arch/arm64.xml - contributed by Ali in LP: #1349854
arch/ppc64el.xml - contributed by Christian Ehrhardt in LP: #1573820

Others:

ussh/ - contributed by Scott Moser in https://gist.github.com/smoser/88a5a77ab0debf268b945d46314ea447

uvt-show-images - contributed by Mike Pontillo in https://code.launchpad.net/~mpontillo/uvtool/+git/uvtool/+ref/add-uvt-show-images-script
