From the similarly named subreddit:

Shoes:

Canada West (MB) https://www.canadawestboots.com/

Tatra (ON) https://www.tatra.ca/ (work boots)

La Canadienne (QC) https://lacanadienneshoes.com/

Wohlford (BC) https://www.wohlford.ca/ (work boots)

Viberg (BC) https://viberg.ca/ ($$$$)

Padraig Cottage (BC) https://www.padraigcottage.com/ (baby slippers)

Martino (QC) https://www.boutiquemartino.com/en (boots)

Clothing:

Anian (BC) https://anianmfg.com/

Canadian Wolf (QC) https://www.canadianwolf.com/

Province of Canada (ON) https://provinceofcanada.com/ (size runs a bit big)

Little and Lively (BC) https://www.littleandlively.com/ (kids)

Victoire Boutique (ON) https://victoireboutique.com/

Naked and Famous Jeans (?) https://www.nakedandfamousdenim.com/

Polar Piece (ON/ BC) https://www.polarpiece.com/

North Standard (ON) https://northstandard.com/

Simply Merino (BC) https://www.simplymerino.ca/

Jerico (ON) https://jerico.ca/

Good for Sunday (ON) https://goodforsunday.com/

Stanfields (NS) https://www.stanfields.com/

Blondie Apparel (ON) https://blondieapparel.com/

Rowe (BC) https://wearerowe.ca/

Happiness Is Inc (ON) https://happinessisinc.com/

Ecologyst (BC) https://ecologyst.com/

This is J (ON) https://thisisj.com/ (bamboo PJs)

Local Laundry (AB) https://locallaundry.ca/

House of Blanks (ON) https://www.houseofblanks.com/

Blankets/ Socks/ Hats:

MacAuslands (PEI) https://www.macauslandswoollenmills.com/index.php

Topsy Farms (ON) https://www.topsyfarms.com/

JB Fields (ON) https://www.jbfields.ca/

Thermohair (ON) https://www.thermohair.com/

Custom Woolen (AB) https://www.customwoolenmills.com/

Dream Power Costume (ON) www.dreampowercostumes.com (bath hoodie)

Leave Your Hat On (hats) (NS) https://www.leaveyourhaton.com/

The Hat Junkie (NS) https://www.hatjunkie.com/

Leather Goods/ Accessories

Popov Leather (BC) https://www.popovleather.com/

Populess Leather (AB) https://www.populess.com/

Mariclaro (ON) https://www.mariclaro.ca/

Phee’s original goods (NS) https://pheesoriginalgoods.ca/

Small Hours (ON) https://smallhours.ca/

Crafted Gambit Goods (AB) https://www.craftedgambitgoods.com/

Fab Hand Crafted (QC) https://www.fabhandcrafted.com/ (specialize in camera straps)

Food/ Cooking:

Three Farmers (SK) https://threefarmers.ca/ (Camelina Oil)

Thomas Haas (BC) https://www.thomashaas.com/ (Chocolatier)

Arbol Cuisine (QC) https://arbolcuisine.com/ (Cutting Board)

Meyer (PEI) https://meyercanada.ca/collections/meyer (Cookware)

Heartbeat Hot sauce Co (ON) https://www.heartbeathotsauce.com/ (Hot sauce)

Maritime Madness (PE) https://maritimemadness.com/ (Hot sauce)

La Pimenterie (QC) https://lapimenterie.com/en/montreals-finest-hot-sauces/ (hot sauce)

Appleton Chocolates (NS) https://www.appletonchocolates.ca/

Natural Wellness:

Saje (BC) https://www.saje.ca/

Attitude (QC) https://ca.attitudeliving.com/

Glowing Orchid (BC) https://glowingorchid.com/

Rocky Mountain Soap (AB) https://www.rockymountainsoap.com/

Salt Spring Soap Works (BC) https://www.saltspringsoapworks.com/

Earth Elementals Soap (NS) https://earthelementals.ca/

Birch Babe (ON) https://birchbabe.com/

Warm Buddy (ON) https://www.warmbuddy.com/

Cool Nukes Bowl Cozies (NS) https://coolhandnukes.com/

Jewelry:

Forestial Friends (BC) https://www.etsy.com/ca/shop/ForestialFriends

Proud Wednesday (AB) https://proudwednesday.com/

Leah Alexandra (BC) https://leahalexandra.com/

Strut (ON) https://www.strutjewelry.com/

Eidel Precious (ON) https://www.etsy.com/ca/shop/EidelPrecious

Twenty Compass (QC) https://twentycompass.com/

Furniture:

Go Coconut (QC) https://gococonut.ca/

Off Your Rocker (ON) https://offyourrocker.ca/

Craft/ Stationary/ Candles/ Puzzles

Hemlock & Oak (BC) https://www.hemlockandoak.com/

Pietersmatin Works (ON) https://www.pietersmatinworks.com/

Little May Papery (AB) https://littlemaypapery.com/

Cordova Candle (BC) https://cordovacandleco.com/

Honey Candles (BC) https://www.honeycandles.com/

Stumpcraft (AB) https://www.stumpcraft.com/

Milk Jar Candle (AB) https://milkjar.ca/

Crowfoot Candle (BC) https://www.crowfootcollective.com/

Flaunt Cards (BC) https://www.flauntshop.com/

Other:

Wildflower Seed Bombs (?) https://wildflowerseedbombs.ca/

Scam Skate (MB) https://scamskate.com/

Salt Spring Seeds (BC) https://www.saltspringseeds.com/

Heritage Harvest Seeds (MB) https://heritageharvestseed.com/

Annapolis Seeds (NS) https://annapolisseeds.com/

Revival Seeds (NS) https://revivalseeds.ca/

Greta’s Family Gardens (QC) https://www.seeds-organic.com/