International Commission for Optics
- http://www.ico-optics.org/
- Contributes on an international basis to the progress and diffusion of knowledge in optics. Gives details on conferences, meetings, awards, travelling lecture programs and ICO newsletters.
Metaphotonics
- http://www.metaphotonics.de/
- Reports the research in Karlsruhe on the fabrication and optical characterization of functional metallic nanostructures for optical frequencies.
Sofia University OSA Student Chapter
- http://www.osabg.org
- Chapter of the Optical Society of America at Sofia University, Bulgaria, established to promote the Science of Light among the students and to broaden their insight for post-graduate career.