Product Hunt - A website that lets users share and discover new products
Ship Ship Ship - 🚢 Ship Ship Ship stickers
Merch by Amazon - Create, sell, and promote custom branded t-shirts
Bubblehunt - Discover products based on recommendations from influencers
Swag for Dev - A list of opportunities for developers to score some swag 😎
NOFAME - Probably the world's most unique T-shirt brand