The Safety Net (highlighted in a BITeS post) is a great online resource for crowd-sourced standard operating procedures established by Prof. Alexander J. M. Miller (University of North Carolina at Chapel Hill) and Prof. Ian A. Tonks (University of Minnesota – Twin Cities). It primarily contains SOPs from the Miller and Tonks research groups, but they invite submissions from the chemistry community. It is a treasure trove of useful information, safety resources, and links to physical property databases.