Le Wiktionnaire

Le Wiktionnaire allows for this kind of search. It may not be complete (especially, it does not always have a list of names composed with this ending) but it usually features at least some examples and it does say whether that ending is masculine or feminine.

For your examples:

• -age: https://fr.wiktionary.org/wiki/-age (masculine, missing a list of composites)
• -ade: https://fr.wiktionary.org/wiki/-ade (feminine)

Le Centre National de Ressources Textuelles et Lexicales

The CNRTL also proposes this kind of definitions, with seemingly more complete lists of names made from the suffixes. I am less familiar with it, but some others on this StackExchange will have much more knowledge about it.

Same examples:

• -age: http://www.cnrtl.fr/definition/-age
• -ade: http://www.cnrtl.fr/definition/-ade

Lexique.org provides an advanced search tool.

Searching for words ending with -age or -ade is done from that page that way:

and leads to this result.

…

In book form, you can use the Dictionnaire des rimes edited by Larousse.