Steam Charts - An ongoing analysis of Steam's concurrent players.
Pricing Page Teardown from ProfitWell - Data and banter behind the best (and worst) pricing pages
Steam Database - This tool was made to give better insight into the applications that Steam has in its absolutely huge database.
SaaS Financial Plan - Customizable SaaS financial plan model
Steam Spy - Steam Spy is Steam stats service based on Web API provided by Valve and cool idea of Kyle Orland...
Financial Model - Financial Model for Planning, Launching, or Running Startups