HEATKEYS

Wolfram|Alpha gives you access to the world

Coolmath has a ton of cool math games and puzzles, lots of really clear math lessons (arithmetic, fractions, decimals, algebra, etc.), fractals, geometry, tessellations and more. Tons of very cool math stuff for kids, teens, parents and teachers too!

Simple, fast and handy calculator for calculations at home, work or study

Explore math with desmos.com, a free online graphing calculator

Free Online Scientific Notation Calculator. Solve advanced problems in Physics, Mathematics and Engineering. Math Expression Renderer, Plots, Unit Converter, Equation Solver, Complex Numbers, Calculation History.

Cool websites, cool software apps, howto articles and Internet tips.

The University of California, Berkeley has developed this free, user-friendly calculator to help you estimate your carbon footprint and compare it to households of similar size and income. Get a personalized report for your household or small busines...

Sleepyti.me is a bedtime calculator that can help you calculate when to fall asleep. By counting backwards in sleep cycles, sleepyti.me has the ability to help you wake up refreshed, instead of feeling groggy. Sleepyti.me can also help you figure out...

eXtreme Outer Vision - eXtreme tools for computer enthusiasts

HVAC Calculator

WebMath is designed to help you solve your math problems. Composed of forms to fill-in and then returns analysis of a problem and, when possible, provides a step-by-step solution. Covers arithmetic, algebra, geometry, calculus and statistics.

Cool Calc is a suite of web-based software designed to save HVAC contractors time and money.