Franzelio is described as 'Interactive musical instrument that lets you create music by drawing lines and sharing your creation with the world' and is a music production app in the audio & music category. There are 2 alternatives to Franzelio, not only websites but also apps for Windows. The best Franzelio alternative is turtle.audio, which is free.
turtle.audio is a music sequencer inspired by turtle graphics programming. The free web app provides an audio environment where simple text commands generate lines similar to turtle graphics but that can play music.
United States
HighC is a graphical music creation and composition software tool. Its goal is to make music composition as simple and direct as sketching.
