If you use Flickr, Smugmug, or Facebook there are many ways to post photos and videos to your account. You can do it right through the websites of the company, you can get plug-ins for iPhoto, you can use iOS apps, or you can use an app like Poster. Poster, by Reinvented Software, is made to upload content to your account of one of the three mentioned services. How does it work? Read on.