Fizzygum

The power of an entire Operating System at your fingertips:

✔ make dashboards and visualise data (plots, maps, …)
✔ author, organise and navigate documents
✔ insert dynamic calculations anywhere, via simple drag & drop
✔ make custom utilities visually (no coding required)
✔ use internal development tools to customise anything, as it runs
✔ do all of the above, concurrently

from Hacker News http://fizzygum.org/