Find those satellites and watch the International Space station without a telescope.

Image: Nasa.gov

• Heavens-above.com
• Nlsa.com
• N2yo.com
• Spaceweather.com
• Whereisvoyager.com
• Patriciogonzalezvivo.github.io/LineOfSight/

Build an open source satellite tracking ground station

• Satnogs.org