You might also be interested in my microlibrary trkl.js, a Knockout-like observables library that's just 383 bytes minified and gzipped: https://github.com/jbr

You might also be interested in my microlibrary trkl.js, a Knockout-like observables library that's just 383 bytes minified and gzipped: https://github.com/jbreckmckye/trkl https://github.com/jbreckmckye/trkl I've used this for production sites where bytes down the wire is a hard constraint.