By the way - I didn't find any niche perfumeries at such popular places as Etretat and Fecamp. Just as little as for Mont Saint Michel. Nethertheless - I HAD to place this amazing picture of this abbey!-)
Caen
Perfumeries
Brands: Alexandre J, Au Pays de la Fleur d'Oranger, Aedes, Beaufort, Bottega Profumiera, Collection Croisiere, Escentric Molecules, Evody**, Etat Libre d'Orange, FriedeModin, Huitieme Art, Jacques Zolty, Jul et Mad, Laboratorio Olfattivo, Les Inedits, Maison Incens, Majda Bekkali, Moresque, Nabucco, Paul Emilien, Phaedon, Parfums MDCI, Parfumerie Generale, Parfums 1907, Parfums de Marly, Ramon Molvizar, Ramon Monegal, Teo Cabanel, Technique Indescrete.
Actually this is the boutique of the perfume brand Divine. However there're also another brands, which are sold at this shop: Acqua di Parma, Les Parfums de Rosine and Serge Lutens.
Brands: Acqua di Parma, Baobab Collection, Diptyque, Esteban, L'Artisan, Maison Martin Margiela, Serge Lutens**.
Brands: Caron, Molinard, Reminiscence.
The branch at 83/87 RUE ST PIERRE stocks Caron, Laurence Dumont Les Senteurs Gourmandes, Reminiscence, Serge Lutens etc
Brands: Atelier Cologne*, Acqua di Parma*, Annick Goutal, Durance, Esteban, Laurent Dumont, Parfums Berdoues, Serge Lutens.
Brands: Esteban
Brands: Jardin de France.
Brands: Molinard, Serge Lutens.
CORPS ET AME
Brands: Florame, Honore des Pres, Melvita.
Brands: Cire Trudon.
Jemaro
Brands: Melvita.
Deauville
Brand Stores
Hermessence' line.
Perfumeries
Brands: Acqua di Parma, Annick Goutal, Caron, Diptyque, Frederic Malle**, Juliette has a Gun*, L'Artisan*, Patyka, Reminiscence, Serge Lutens, Terry de Gunzburg, Yves Saint Laurent Le Vestiaire.
Par Hasard
Brands: Astier de Villate, L'Artisan.
Villa Homme
Brands: Cire Trudon.
Brands: Molinard, Serge Lutens.
Honfleur
Brand Stores
In theory with Les Nereides' fragrance line.
Perfumeries
Parfumerie Helard
Brands: Acqua di Parma, Jean Charles Brosseau.
POULETTE DE LUXE
Brands: Hayari.
Brands: if still opened - Arty Fragrances.
Le Havre
Perfumeries
Tribeca
Brands: Astier de Villatte, Arty Fragrances, Annick Goutal, Aedes**, Anna Rivka, Arquiste**, Byredo**, Diptyque, Juliette has a Gun**, Miller Harris, Oriza L. Legrand, Penhaligon's, Une Nuit Nomade (Une Nuit a Bali).
Brands: L'Artisan, Reminiscence.
Brands: Caron, Laurence Dumont Les Senteurs Gourmandes, Molinard, Reminiscence.
NATHALIE INSTITUT
Brands: E.Coudray.
MA PREMIERE BOUTIQUE
Brands: Cire Trudon, Lorenzo Villoresi.
Brands: Molinard, Serge Lutens.
Rouen
Brand Stores
Hermessence' line.
Perfumeries
Brands: Au Pays de la Fleur d'Oranger*, Baruti, Brecourt*, Comptoir Sud Pacifique*, d'Orsay, Evody, Floris, Gri Gri Parfums, Hierbas de Ibiza, Histoires de Parfums, Heeley, Initiation olfactive, Jean Patou, Jardins d'Ecrivains, Juliette has a Gun, Lubin, Le Galion, Les parfums Anatole Lebreton, Liquides Imaginaires, Oriza Parfums*, Olfactive Studio, Santa Maria Novella, Teo Cabanel, The Different Company, UNE NUIT A BALI**, Volnay.
There also used to be La Manufacture, Nelli Rodi.
Brands: Acqua di Parma, Atelier Cologne**, COMPTOIR SUD PACIFIQUE*, Caron, Esteban, L'Artisan*, Parfums Berdoues, Serge Lutens, Terry De Gunzburg.
Brands: Caron, Durance, Esteban, Laurence Dumont Les Senteurs Gourmandes, Parfums Berdoues, Reminiscence.
Brands: Esteban
Brands: Durance.
Parfumerie Nocibé
Brands: Annick Goutal.
Brands: Baobab Collection, Crabtree&Evelyn, Creed, Laduree.
ILYENA
Brands: Provence Sante.
Brands: Molinard, Serge Lutens.
Brands: Caron, Molinard, Laurence Dumont Les Senteurs Gourmandes, Reminiscence, Serge Lutens, Tom Ford Private Blend (some of them)
MA PREMIERE BOUTIQUE
Brands: Cire Trudon, Diptyque, Lorenzo Villoresi.
Pharmacie du Centre
Brands: Comptoir Sud Pacifique.
L'HERBORISTERIE
Brands: Melvita.
LA VIE CLAIRE
Brands: Melvita.
GRAIN GOURMAND
Brands: Florame.
PROVENCE NATURE
Brands: Florame.
Trouville-sur-Mer
Perfumeries
Les Grains de Sable
Brands: Comptoir Sud Pacifique.
*According to the homepage of the brand.
**According to the homepage of the store.