Humane Society of Puerto Rico
- Society that provides for the better care of animals and aims at having a culture were animals are treated with respect.
- http://www.hspr.org/index2.html

Earthquake Activity
- Government site with information about seismic phenomena around Puerto Rico and the Virgin Islands.
- http://wwwneic.cr.usgs.gov/neis/states/puerto_rico/puerto_rico.html

SiKeO
- The environmental portal site for the archipelago of Puerto Rico. A comprehensive collection of online environmental resources and information about our islands.
- http://netdial.caribe.net/~fantosva/