Igloo is an intranet you’ll actually like: built with easy-to-use, integrated apps like shared calendars, Twitter-like microblogs, file sharing, and more. Everything you need is built-in, and everything is social. This means when you upload a file or write a corporate blog post, your team can share it, comment on it, rate it, like it, and even manage versions in the same spot.
If your company has a legacy intranet built on SharePoint, you should give Igloo a try. This report from Igloo outlines the five main areas SharePoint falls short and how Igloo does it better.
My thanks to Igloo for being the launch sponsor of Stratechery. Definitely check them out!