It really depends on how deep in the stack you're working. Apache and Nginx already have support for IPv6. If you're using something like node.js directly, you'll need to bind to an IPv6 port as well.
I'm also fan of Django Debug Toolbar, enough so that I adopted the package in Debian. Unfortunately, there isn't an active upstream maintainer right now. As the README file says:
"There's no active maintainer at this time. You're welcome to file issues and pull requests but you may receive no answer until a new maintainer steps up."
As a refugee displaced by the Great VCS Wars, I certainly agree. Bazaar's command line interface was the thing that made me initially lean towards it rather than git.
We're trying to collect clients using APIv2 over on the community site. Barge is already listed:
https://www.digitalocean.com/community/questions/what-librar...