Here is a small reference library of online titles I use for genealogy. Please feel free to use them yourself.
Pioneer Index – families in Onondaga County before 1850
Pioneer Index A-Bre
Pioneer Index Bri-C
Pioneer Index D-Gow
Pioneer Index K-Moy
Pioneer Index Mu-Roy – currently unavailable because of problems at Family Search
Pioneer Index Ru-Ti
Pioneer Index To-Z