ImgurUp is a GNOME desktop application for uploading images to the Imgur.com service (using the Anonymous API) and keeping track of your uploads in your own desktop database. It allows easy access to your uploaded images at any time.
PySnippy is a simple GNOME desktop application for managing your snippets online (at snipplr.com) and offline from an SQLite database.
QtitanDataGrid is a grid for business application in Qt.
A general-purpose Java library.