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Principal Sponsors

The William and Flora Hewlett Foundation: Makes grants to address the most serious social and environmental problems facing society, where risk capital, responsibly invested, may make a difference over time.
National Science Foundation: An independent federal agency created by Congress in 1950 to promote the progress of science.
Excellence Center of Science and Mathematics Education at King Saud University: King Saud University seeks to become a leader in educational and technological innovation, scientific discovery and creativity through fostering an atmosphere of intellectual inspiration and partnership for the prosperity of society.

Sponsors

PhET would like to thank the following organizations, companies, and individuals for their support:

Financial Support

Platinum Level Contributors ($100k+)
Gold Level Contributors ($10k - $100k)
- Microsoft Research
Bronze Level Contributors ($0 - $10k)
- Dr. Andrew McNeil
- Bryan K. Long

Technical Support

Piccolo
An open source graphics library
JFreeChart
An open source chart library
Raymond Sheh's JADE
A dynamics engine
Sourceforge.net
For hosting our source code repository
Proguard
An open source tool for code shrinking
JetBrains
For providing for our Java development environment
ej-technologies
For providing for our Java profilers
BitRock
For providing for our installer builder
Royal Interactive
For original site concept
Dynamical Systems
For providing one of their tutorials

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