What are some alternatives?
SU2 - The open source CFD code.
Google Ad Manager - Grow revenue wherever your users are with an integrated ad management platform that surfaces insights for smarter business decisions.
OpenFOAM - OpenFOAM® - Official home of The Open Source Computational Fluid Dynamics (CFD) Toolbox.
OpenX - Ad technology platform available as a hosted service or as an open source download.
simFlow - SimFlow is a powerful CFD software, focused on engineering and science.
LeadBolt - LeadBolt is a mobile advertising platform for user acquisition and in-app monetization.