Ventilador: http://forum.fritzing.org/t/fan-ventilador-5v-download-piece/2096

Relays: https://timgolisch.wordpress.com/2015/02/22/fritzing-2-channel-relay-part/ https://github.com/rwaldron/fritzing-components

https://github.com/adafruit/Fritzing-Library/tree/master/parts

Otros: http://omnigatherum.ca/wp/?tag=fritzing