Disclosure: TotaraLMS is a supporter of the Moodlenews blog and newsletter.
If you’re interested in the Totara distro of Moodle, which is tailored for businesses and includes several additional features like reporting and learning plans (full Totara feature list is here: http://totaralms.com/feature-a-benefits) you can now download the code base at Moodle HQ’s github repository: https://github.com/moodlehq/totara.
Totara’s business model is providing hosting contracts and services to Totara users so that they can concentrate on teaching and learning. However, now if you’re interested in a specific piece of Totara or just want to trial the code to compare it to standard Moodle you can do so (with a little technical expertise required).
Totara’s leadership have been involved with Moodle’s own development for years, one of the most recent contributions to the open source Moodle project is Badges http://docs.moodle.org/26/en/Badges.