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Jim - An overview of Jim capabilities
Wheel Decide - Wheel Decide is a free to use web-based spinner platform that allows the people create their own digital wheels system for prize giveaways, decision making, games and much more.
Insect - High precision scientific calculator with full support for physical units.
RANDOM.ORG - RANDOM.ORG offers true random numbers to anyone on the Internet.
errProof - The website has a lot of useful and unique tools.
Wheel of Names - Free and easy to use spinner. Used by teachers and for raffles. Enter names, spin wheel to pick a random winner. Customize look and feel, save and share wheels.