http://www.ffap.net/
The website of the Fédération Française des Associations Philatéliques

http://amisdemarianne.blogspot.fr/
The website of the Cercle des Amis de Marianne

http://www.sococodami.com/
The website of the SOciété des COllectionneurs de COins DAtés et de MIlésimes

http://unionmarcophile.fr/
The website of the Union Marcophile

http://phila-france-varietes.vraiforum.com/
A website about varieties on French stamps

http://www.timbres-barres-phosphorescentes.fr/
A very comprehensive website on phosphor bands

http://www.dieproofs.it/
Everything which may be known about dies, proofs...

http://blog-impressions-timbrees.blogspot.fr/
papy24’s blog on printing of stamps

http://blog-philatelie-timbrephosphonews.blogspot.fr/
Supergaston45’s blog, almost active every day

http://phila-france-varietes.vraiforum.com/
A blog on French philatelic varieties

http://www.arp35.fr/LettresARP/Ceres%201938-41/Ceres38_41.htm
A website about the “Cérès de 1938”

http://ma-marianne-de-briat.org/
A website about the “Marianne de Briat”

http://mariannedecheffer.over-blog.com/
A website about the “Marianne de Cheffer”, unfortunately inactive

http://phil65.chez-alice.fr/
A website about the “Marianne de Gandon”

http://muller.j257.fr/
A website about the “Marianne de Muller”

http://www.marcophilie.org/
A very comprehensive website on postmarks

http://sabinedegandon.com/
A website about the “Sabine de Gandon”

http://lesansphosphore.blogspot.fr/
A museum about without phosphor bands stamps, with very interesting pieces

http://www.semeuses.com/
A website about the “Semeuses”

http://semeuse22.free.fr/
Another website about the “Semeuses”

http://semeuse25cbleu.net/
A website about the “Semeuse 25c bleue”

http://www.j257.fr/
A website about the stamp “Orléans 1929 Jeanne d’Arc”

http://agnes.arvis.pagesperso-orange.fr/
A website about stamps of type “Chaînes Brisées”

http://www.timbre-mercure.fr/
A website about stamps of type Mercure

http://philapostel.net/ppo/etudes/e-pageprinc.php?zc=e-mercure.inc.php&page=e03&npg=2&autor=GLLM&ms=N
Another website about stamps of type Mercure