I have uploaded transcriptions for existing 19th and early 20th century gravestones from the following durham churches at
http://www.thegenealogist.co.ukAycliffe Church – St Andrews
Barnard Castle – St Mary's Parish church
Brancepeth Church – St Brandons
Brancepeth Village Cemetery
Byers Green – St Peters
Chester-Le-Street St Mary's
Coke Works Death
Coundon Church
Coxhoe – St Mary's Church
Crook Cemetery
Eldon – St Marks
Ferryhill – St Lukes
Gateshead – St Marys
Heighington Church
In Servitude
Iron Works Death
Kelloe – St Helens Church
Lanchester Parish Church
Merrington Church
Metal Bridge Cemetery (Nr Spennymoor)
military
Miner Death
Overseas death
Railway death
Sedgefield – St Edmund's
Shildon – St John's Church
South Church – St Andrews
Spennymoor – Holy Innocents Churchyard
Spennymoor – Rock Road Cemetery
Spennymoor – St Paul's Church
Spennymoor – York Hill Cemetery
St Helens Auckland – St Helens
Staindrop – St Mary The Virgin
Tudhoe Village (Spennymoor) – St Charles
Whitworth Church
Simply type in surname, christian name and date of death (if known) and "Bob's your late uncle".