There are 2 repositories under header-bidding topic.
Setup and manage header bidding advertising partners without writing code or confusing line items. Prebid.js is open source and free.
Automated line item generator for Prebid.js and Google Ad Manager
A curated list of awesome advertising content, resources and libraries.
ArcAds is a DFP wrapper created by Arc XP with publishers in mind.
Implements header bidding for Radiant Media Player through Prebid.js
The Android Chartboost Mediation SDK, by Chartboost, is a Unified-Auction & Mediated solution which helps developers increase their mobile apps' revenue with the inclusion of other supported Programmatic & Mediated SDKs.
Server side component to offload prebid processing to the cloud
Project simulates client side header bidding. Server acts as a mock ad-server. Client selects the ad with highest bid and displays it.
A simple GAM googletag architecture implementation allowing easy feature plugin with separation of concern and timeouts for better scallability and performances