The Library at the The Chartered Society of Physiotherapy (UK) have kindly researched the availability of free physiotherapy information and recommend the following sites:
Cochrane Library
National Library for Health
PeDRO (Physiotherapy Evidence Database)
PubMed (MEDLINE)
REHABDATA database
List compiled by Library and Information Services, The Chartered Society of Physiotherapy
Cinahl, Embase and AMED are also good sources of Physiotherapy information but are subscription based.
Also:
The Irish Society of Chartered Physiotherapists may be able to help: