Most of you will probably know and use FreeBMD because of its excellent coverage of the Birth, Marriage and Death register indexes - which have been constructed by socially aware family historians who wanted to help others. Coverage is almost complete from 1837 to 1960. In May 2013 it contained 229,076,495 distinct records, and on one day in June was searched 145,484 times. Volunteers are still needed to help complete the work.
FreeCEN aims to provide a similar service for the census, and FreeReg for the parish and non-conformist registers. However in both cases the coverage of Hertfordshire is small and volunteers are needed.
So if you are retired and want to do something useful helping others why not volunteer today.