Sum: Frequently Asked Questions

Open Source

Sum is open source. What does that mean?

Last updated July 26th, 2009

The source code to Sum is freely available for anybody to review.

Anybody can submit modifications to Sum.

Code submissions go live only after being thoroughly tested and reviewed.

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How do I know that Sum is accurate?

Last updated July 26th, 2009

Sum's test suite (1) (2) is publicly available for review.

The test suite covers all forseeable email output scenarios, and is considered complete in that aspect.

The creator of Sum and numerous others use the service every day.

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Where can I get the source code?

Last updated July 26th, 2009

Anybody can fork our GitHub repository, commit changes, and submit a pull request.

There will be a reviewal process before your commits are added.

All contributions are greatly appreciated!

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