The goal of Sidosi is to be a comprehensive, up-to-date, and most importantly permanent resource for learning Solresol. Sidosi is currently home to the largest known active Solresol community, as well as the effort to build the world's first comprehensive Solresol translator. Sidosi also hosts a large archive of historical and modern documents about Solresol, as well as publishing its own documents.
Solresol is a constructed language created by François Sudre, beginning in 1827. Solresol, created to be an international auxiliary language, is based on the solfège musical scale: do, re, mi, fa, sol, la, si. Words are formed by combining the syllables, and may be spoken, sung, hummed, played on a musical instrument, written as numbers, musical notation, or the seven colors of the rainbow, signed with hand gestures, or any of many other methods of communication.
Sidosi.org was a website and community that collected and archived Solresol information aiming for further development of the language. However, the site has languished and become abandoned. The Bibliotheca Anonoma aims to collect the information back in one place again.
While the resources page of sidosi.org links to many dead websites, most of the pages are actually archived by Sidosi (except about 4). Just click the Show/Hide All button to see the archived links.