This is a quick roundup about WebGL map libraries. Since IOS is supporting WebGL and the browser support is getting better in general, it becomes a relevant technology for map applications too. Stepless zooming, tilting or rotating are features that almost all of the libraries can do. If the map is rendered on the fly and doesn’t rely on images, you can also change its styles and show and hide certain features on demand.
If you are missing a certain library just leave a comment or contact me via twitter.