Canadian Centre for Experimental Radio Astronomy (CCERA): A project dedicated to the use of Software Defined Radio in radio astronomy. CCERA provides open source resources and software for citizen science radio astronomy. Digital Signal Processing in Radio Astronomy (DSPIRA) – An NSF Research Experience for Teachers Program; check for updates GNU Radio – free, open-source, software-defined radio Green Bank Observatory National Radio Astronomy Observatory Open Source Radio Telescopes Wiki – our Wiki pages with ideas, information exchange, etc. Society of Amateur Radio Astronomers – excellent source of information, resources, and like-minded individuals.