Stripe's Open Source Javascript Library For A/B Testing

The layout of signup and payment forms can have a huge impact on paid conversions. Stripe's in-house testing library lets you see conversion rates per day for a configurable time period, slice data by browser type, and weight different variants that some appear more times than others. Bonus: It also calculates a Z-score for the conversion rates it displays, indicating the statistical probability that a results are accurate.

Find the project by macman here on Github.