Bassist Emilio Guarino from New Jersey (USA) has designed an angled endpin, and in order to mass-produce this endpin, he asks for support at Kickstarter:

Angled bass endpins were first adopted by Francois Rabbath and his students, but thanks to their many benefits they are becoming more mainstream every year.
Angled endpins are very popular because they make the bass easier to play. The bass feels as if it is floating. It moves with the motion you need to play the instrument, not against it. Straight endpins balance best when the bass is completely vertical. This position is not ideal for actually playing it. If you’ve ever felt like it was difficult to keep the bass in a comfortable position, you know what I’m talking about. Angled endpins keep the bass in a comfortable position in all ranges of the instrument.

I created The Chromatic Endpin to solve these problems. I wanted a solution that I could use on different basses and allow me to experiment without modifying my instrument. Also, it has the added benefit of being very user friendly. No professional installation is necessary. It takes less than two minutes to assemble and it adjusts even faster.