Spindlytext
This library lets you write in the sky in Google Earth (and the Google Earth plugin) using KML LineStrings. It was developed as part of Pigeon Sim.
Demo
Here's a simple example usage.
Documentation
None yet, but between the demo source and the library source you can probably figure it out.
Character set
A key part of the library is its homegrown, spindly font. I think I've included all the characters you're likely to see in everyday English, but very few accented characters are implemented. Pull requests welcome here.
TODO
A method returning a three.js THREE.Line might be handy.
Licence
This code is released under the GPL v3. To negotiate GPL-incompatible uses, feel free contact me.