Catholic Parish Register Indexes on the ScotlandsPeople database are free to search until Saturday 9 January, 23:59 GMT (normally 1 credit per page of 25 results).
Spanning 1708 to 1903 (but mostly from the early 1800s onwards), the registers comprise records of births and baptisms, marriages, deaths and burials, and also a small set of fascinating records of communicants, sick calls, first confessions and seat rents.
You can find out more about the registers here.
Images cost 5 credits per record to view (7 credits cost £30).
You need to register to search the indexes. No financial information is required for registration.