CygnusCMS is a CMS for Google App Engine. It is scalable and easy to use. It lets you upload multiple images with one set of metadata for the group. It also features integration with Flickr, Twitter, and Last.fm.
ShortURL shortens URLs using different Web services APIs. It supports Google goo.gl, TinyURL, Adf.ly, and YouTube. If a given short URL service fails, it may fallback to a different URL.
A Transport Layer Security Library implementation.
A simple DDNS client