StartupShirts.org - THE marketplace for startup swag
GIPHY Stickers for Instagram Stories - Add fun GIF stickers to any photo or video in your story
StartupDrugz - T-shirts & posters celebrating the absurdity of startup life
Sticker.Place API - Get stickers for your app
DevTees - Graphic t-shirts made for developers.
LinkedIn - LinkedIn is a business-oriented social networking service, mainly used for professional networking.