A simple tripod I created in Tinkercad https://www.tinkercad.com/things/eWe8xXM5Ba8-daring-duup-jaiks
I'm using it to store round(ish) objects like my collection of celestial objects (models of Planets and Asteroids) on the shelves. suddendly, they are presented and are nut just rolling around.
STL file is ready to print. I suggest adding a brim because the contact surface of the legs to the print bed is rather small. No support needed.