These are business cards you can pass out to strangers when they are being assholes. Just check some simple boxes, hand the card to the perpetrator, and leave the scene. This allows you to not have to confront the person directly - in case said aggression heightens - but still feel comfort in knowing you took direct action in telling someone off. These cards can be given by the person dealing with the transphobia/racism/ableism/sizeism/misogyny/xenophobia/islamophobia directly or by witnesses that see some bullshit happening to someone else. (Ideally, these should be used in public places where you are surrounded by others so as to avoid direct violence.) If you're feeling uncomfortable handing this card to the person, hand it to someone else in the scene and ask them to give it to the person, then leave.
Please download this file and disseminate wildly. Buy a thousand cards on Moo.com or other cheap business card companies and pass them out to all of your friends!