There are 2 repositories under umbraco8 topic.
Personalisation Engine for Umbraco 8
Add Font Awesome to your selectable icons in Umbraco 7 & Umbraco 8
A sandbox for ecommerce provider Vendr
Umbraco 8 - ImageProcessor/TinyPNG menu optimiser
Umbraco 8 Back Office Single Sign-On using OpenID Connect
DictionaryBuilder is an unofficial Visual Studio extension for generating a strongly typed dictionary service and models for Umbraco. The extension is available to download and install from the VS marketplace using the link below.