Dabo is a three-tier, cross-platform database application development framework, written in Python with the wxPython GUI toolkit. The controls in Dabo's UI are easily bound to data by setting two properties. The business object is designed to afford you complete control over the validation and handling of your data. The cursor classes are abstracted from their backend implementations, allowing for easy support of nearly any backend database. Dabo's design and approach has been inspired by RAD database development tools such as Visual FoxPro, Delphi, and Visual Basic.
Arora is a simple cross-platform Web browser whose feature list includes things like "History" and "Bookmarks". It has a small code base. It was originally created as a demo for Qt to help test the QtWebKit component and find API issues and bugs before the release. A very old version can still be found in Qt's source code in the demo/browser directory. Arora works on Linux, OS X, Windows, FreeBSD, and embedded Linux using Qt Embedded, and works anywhere else Qt does.
SignPDF is a simple command line application to sign a PDF document. It can sign a PDF document with a valid certificate, encrypt/protect a PDF document, and timestamp a PDF document (optional feature). A JKS keystore with a cert signed by your desired CA is mandatory for use. The tsa_url of a timestamp server can be used to timestamp your documents. The signed PDF file is signed and protected with allowed restrictions to printing, content copying, and content copying for accessibility. By default, SignPDF creates a configuration file at ~/.signpdf, which can be edited for further use.