What are some alternatives?
When comparing Sampulator and Ramsophone, you can also consider the following products
Splice Beat Maker - Make and share beats in your browser
BlokDust - Join blocks together to build sounds with this web-based music making app.
Mubert - Electronic music generated in real-time just for you
Keezy Drummer - Make a beat in seconds
Google Music Lab - Interactive experiments that use the Web Audio API
NodeBeat - Make music with NodeBeat, the intuitive and fun visual music app for all ages.