Introducing BigML’s Free Machine Learning Sandbox. (blog.bigml.com)

"What’s the difference between development mode and production mode? The most obvious difference is that in development mode, you won’t be charged a single credit. The flip side is that your datasets are limited to 1 Mb. That naturally also limits your model training data to 1 Mb."

Good concept, but 1MB is too tiny to risk the time investment necessary to learn your system.