This document discusses strategies for using open source technologies in enterprise IT systems. It proposes a shared open source technical foundation called Improve Foundations that provides pre-packaged open source components, tools, and support to reduce costs, improve consistency, and allow non-Java experts to work on projects. Improve Foundations is a high-level community of companies that share the same technical foundation for their Java projects and benefits from cost sharing, outsourced complexity, and long-term support of open source components.