Tourism and local interest:
River Thames Society - Where Thames Smooth Waters Glide
The Chilterns Society
The Chilterns Area of Outstanding Natural Beauty
Oxfordshire Cotswolds
The Cotswolds Area of Natural Beauty
David Nash Ford's Royal Berkshire History
UK Villages Online
Places within Oxfordshire - Old photos and maps, local books, prints, etc.
Brian Curtis's Photographs of Oxfordshire churches and chapels
Oxfordshire Historic Churches Trust
North Wessex Downs Area of Natural Beauty
Pictures of England - Exploring beautiful England with pictures and history
The National Trust (Thames and Solent Region)

Travel:
Traveline public transport information
Bus and train timetables and maps
Bus and coach operators

Activities:
John Harris's Walking in Oxfordshire
SUSTRANS (Cycling)

Local authorities:
Oxfordshire County Council
Cherwell District Council
South Oxfordshire District Council
Vale of White Horse District Council
West Oxfordshire District Council

Other:
RuralClick - The Portal for Village Halls in the UK