You can use an xmpp client with facebook chat. You can also use an XMPP client with MSN messenger (if you implement microsoft's auth goop). unfortunatly neither facebook or microsoft have enabled federation with there xmpp servers so they are still walled gardens, just walled gardens you can bring your own client to.
XMPP is the way to go, run your own server with ejabberd, prosody or openfire.
That means eschewing privacy-stripping "app stores" on locked down platforms for sideloaded FOSS.
In that case, who will finance the production of video games as free software and free cultural works?
We will, via Kickstarter and it's ilk...
AOAKN HVPKD FNFJU YIDDC
RQXSR DJHFP EOVFN MIAPX
PABUZ WTYNP CMPNW HJR?H
NLXKE M?M?K ONOIB A???Q
UAOTA RBQRH DJOFM TPZLH
LKXEH REEHT JRZCQ FNKTQ
KLDTS EQIRU AOAKN
The F's are quite square, but the E's are rouned.
note that it starts and ends with AOAKN to tell whoever is decoding it how to generate the key.
SOE used "Poem codes":
The DISR movies made from data from the Huygens probe landing on Titan:
Link to Original Source
With the advances in machine vision and CAD/CAM we have these days it would be fairly straight forward. We might have to ship up a fair amount of fluorine for the metallurgical stuff tho...
May 19112? April 19112?
That's a y2k bug, still going strong 12 years later...
They are real, there are still a few out there, and a lot of effort went into finding and fixing the ones you *don't* see.