Implementation for 101 Companies, see http://101companies.org/wiki/Contribution:dancer for details.
Since this contribution is written in it, you will need Perl (Perl 5 that is). If you are using any kind of Unix-like system (e.g. Linux or Mac OSX), you probably already have it installed.
You will also need a few Perl packages that are not part of the standard distribution. They are all in CPAN, so you can use any kind of CPAN installer like cpan or cpanminus.
To install the packages with said installer, just run its command as root with the packages as parameters: cpan Dancer Data::Structure::Util Data::UUID File::Slurp JSON::XS Moops (or replace cpan with whatever the command for your installer is called).
To ensure everything works, cd into this project's folder and run test101.plx. This will test all available features and report the result.
To run the interesting feature of this contribution, namely the web UI, once again cd into the project's folder, run dancer101.plx and then point your browser to http://localhost:3000/, with JavaScript enabled.
See the doc folder for the interface documentation and the .plx and .pm files themselves for the documented code itself.