The web is full of useful free-access resources for genealogy. Here's the proof with these genealogical and biographical dictionaries.
You loved our Top 15 of useful and unusual people lists, maybe you'll find ancestors in this list of genealogical and biographical dictionaries !
    
Universal dictionary of contemporaries, containing all notable people of France and foreign countries
1858 – First edition
1859 – Supplement to the first edition
1861 – Second edition – Part 1 – Part 2
1865 – Third edition
1870 – Fourth edition
1880 – Fifth edition
1893 – Sixth edition
Historical dictionary of holy figures, where one can take an exact notion of the life and memorable actions of the heroes of Christianity - 1772
Biographical dictionary containing up to the year 1840 the list of main characters of all countries – 1848
Biographical and historical dictionary of notable people at the end of the 18th century and particularly those who figured in the French Revolution
1800 – Volume 1 - Volume 2 – Volume 3
Genealogical dictionary of Canadian families since the founding of the colony until today
1871 – Volume 1 (A-Z)
1886 – Volume 2 (ABEL - CHAPUY)
1887 – Volume 3 (CHARBONNEAU – EZIERO)
1887 – Volume 4 (FABAS – JININES)
1888 – Volume 5 (JOACHIM – MERCIER)
1889 – Volume 6 (MERCIN - ROBIDOUX)
1890 – Volume 7 (ROBILLARD – ZIZEUSE)
Genealogical, heraldic, historical, and chronological dictionary
1757 – Volume 1 – Volume 2 - Volume 3
1761 – Volume 4 - Volume 5 - Volume 6
1765 - Volume 7
    
Historical and genealogical dictionary of the families of Poitou
1891 – Volume 1 (AAGE – BRISSET)
1893 – Volume 2 (BRISSON – CYRIAQUE)
1905 – Volume 3 (DABADIE – GAUTREAU)
1909 – Volume 4 (GAUVIN – HERBERIE)
Grand historical, genealogical, and biographical dictionary of the Haute-Marne (Creuse department) – 1894
Historical, genealogical, and bibliographical dictionary of the province and diocese of Maine - 1894 
Genealogical dictionary of the families of Richelieu and their Franco-American descendants since the origin of the family until today - 1909
Happy researching!