Census Links is a growing catalog of links to transcriptions of census, tax lists, birth, death, marriage and military records, all freely available to help with your genealogy research.
From the Colorado State Archives
1880 Mortality Census for the state of Colorado
1870 Mortality Census for the state of Colorado
Search on all marriages (from 1975 to 1998) and divorces (from 1975 to March 1999) in the state of Colorado.
This is a project to study the lives of the early students of the Colorado School for the Deaf and the Blind, which opened in Colorado Springs in 1874 under the name "Colorado Institute for the Education of Mutes."