Many years ago I made a library for Arduino to control an 8x8 LED matrix to display running text. It was not very clean but I like it enough to upload it to the forums (I couldn't find anything similar). One week later it was complely different to what I uploaded and it was super efficient and a bunch of people added new functions and availability but my name still appeared as a main contributor. Of course I put it on my CV and showed it to my professors!