Wren - Offset your carbon footprint by saving rainforests

RANDOM.ORG - RANDOM.ORG offers true random numbers to anyone on the Internet.

YAYZY - Track the carbon footprint of each purchase in real-time

Random Number Generator - Randomly generate integers or floating point numbers within a given range and specified discrete or continuous statistical probability distribution.

Klima - Go carbon neutral

Random-Required - A random string generator that can take numbers, letters, symbols, Chinese characters and arbitrary...