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We desperately need a high quality open-source Firebase/Simperium/Spire. A simple, robust, realtime data synchronization layer with libraries for major platforms. These projects all look great, but outsourcing this infrastructure is simply not feasible for lots of projects.

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CouchDB might fit the bill here, there are now sync-compatible versions for a few platforms:

Server: http://couchdb.apache.org/

iOS / Objective-C: https://github.com/couchbaselabs/TouchDB-iOS

Android: https://github.com/couchbaselabs/TouchDB-Android

In browser and server-side JavaScript: https://github.com/mikeal/pouchdb

Are there any operational transform libs that are transport independant? Socket.io and socketstrwam can handle communication.

ShareJS is a good example. However I don't think this is the right approach necessarily. The FireBase API is a lot simpler and in casual tests it's much faster too.

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