CacheFactory would be the most portable and easiest to debug:

function sharedCache($cacheFactory)
   {
   var sharedCache = $cacheFactory.get('sharedCache') ? $cacheFactory.get('sharedCache') : $cacheFactory('sharedCache');

   return sharedCache;
   }

function bar(sharedCache)
   {
   var data = {
     firstName: 'John',
     lastName: 'Smith',
     pocket: 30
     };

   sharedCache.put('sharedCache', data);
   }

bar.$inject = ['sharedCache', '$scope'];
sharedCache.$inject = ['$cacheFactory'];

angular.module('foo',[]);
angular.module('foo').constant('sharedCache', sharedCache);
angular.module('foo').run(bar);

Filters can read the data and output using ng-include and the templateCache. For example:

function bop(name)
  {
  var data = baz.data.get('sharedCache');
  var tmpl = '';

  try
     {
     tmpl = tmpl.concat('<h1>',data.firstName, '</h1>');
     baz.tmpl.put(name, tmpl);
     }
  catch(e)
     {
     console.log(e);
     }
  }

function baz($templateCache, sharedCache)
  {
  baz.tmpl = $templateCache;
  baz.data = sharedCache;
  return bop;
  }

baz.$inject=['$templateCache', 'sharedCache'];
angular.module('foo').filter('baz', baz);

With this markup:

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app="foo">
  <ul ng-include="'userContent' | baz"></ul>
</div>

CacheFactory would be the most portable and easiest to debug:

function sharedCache($cacheFactory)
   {
   var sharedCache = $cacheFactory.get('sharedCache') ? $cacheFactory.get('sharedCache') : $cacheFactory('sharedCache');

   return sharedCache;
   }

function bar(sharedCache)
   {
   var data = {
     firstName: 'John',
     lastName: 'Smith',
     pocket: 30
     };

   sharedCache.put('sharedCache', data);
   }

bar.$inject = ['sharedCache', '$scope'];
sharedCache.$inject = ['$cacheFactory'];

angular.module('foo',[]);
angular.module('foo').constant('sharedCache', sharedCache);
angular.module('foo').run(bar);

Filters can read the data and output using ng-include and the templateCache. For example:

function bop(name)
  {
  var data = baz.data.get('sharedCache');
  var tmpl = '';

  try
     {
     tmpl = tmpl.concat('<h1>',data.firstName, '</h1>');
     baz.tmpl.put(name, tmpl);
     }
  catch(e)
     {
     console.log(e);
     }
  }

function baz($templateCache, sharedCache)
  {
  baz.tmpl = $templateCache;
  baz.data = sharedCache;
  return bop;
  }

baz.$inject=['$templateCache', 'sharedCache'];
angular.module('foo').filter('baz', baz);

With this markup:

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app="foo">
  <div ng-include="'userContent' | baz"></div>
</div>