Hi, I would like to share my own work on the Observables: https://github.com/lifaon74/observables

Because of some limitations of the RXJS Observables I tried to find a more generic API, where Observers may be activated/deactivated on the fly, may observe more than one Observable, and are not stuck with the 3 following states: next, error, complete.

Fell free to comment directly on the issue tracker