title: Is there an iphone photo thumbnail viewer and browser that is easy to use?
body: <p>I'm adding a thumbnail photo gallery to my iPhone app which will include an iPhone Photo App-like photo browser plus a detail view for each photo.  So far the only thing I've found that provides this is <a href="https://github.com/facebook/three20/" rel="nofollow noreferrer">Three20</a> -- the thing is that Three20 is so huge and has a complex looking API which is not a standard Apple style interface as far as I can tell.  </p>
  
  <p>I've also seen this post <a href="https://stackoverflow.com/questions/4163847/open-source-photo-viewer-for-iphone">Open source photo viewer for IPhone</a> which mentions a couple of other photo browsers -- but these don't have thumbnail galleries built in.  </p>
  
  <p>My question is: does anybody know of a good combination photo-browser and thumbnail gallery library which is easy to use, not excessively large and easy to customize?  Cacheing is also crucial.</p>