I've been using several tutoring whiteboards for brainstorms and remote offices but this one is excellent. Ziteboard gives what it promises - fully device indepent zoomable online whiteboard - for free. Wow. Just wow.
Via María Asunción Martínez Mayoral, Javier Sánchez Bolado
Estupenda herramienta de pizarra online para sobre escribir y redimensionar imágenes, con posibilidades de acceso offline. Muy recomendable