Qtrac Ltd.

Quality Training Research and Consultancy

Qtrac Ltd. (incorporating Qtraining.eu) provides training, consultancy, programming, and documentation services, specializing in the programming languages Python and C++, and in the Qt application development framework—both PyQt4 and C++/Qt 4. All services are provided by author and programmer Mark Summerfield (mark@qtrac.eu).

Services

Consultancy, code reviews, mentoring, programming, and training in:
- C++, Python 2, Python 3, and Go programming;
- C++/Qt 4, PyQt4, and PySide GUI programming;
- Squish GUI application testing;
- Regular expressions.
Technical authoring and editing.
Technical book and document typesetting using the lout typesetting system.

Writing

Our books are listed on the right. Our most recent publication is Advanced Qt Programming. We are currently writing Programming in Go: Creating Applications for the 21st Century. We also have a free download, Moving from Python 2 to Python 3 (4 pages, 676K PDF)—a very concise summary of Python 2 ↔ 3.1 differences plus new Python 3.1/3.2 features.

Free Open Source Software

We maintain three free and open source GUI programs, the most popular of which is DiffPDF. This is a GUI application for comparing PDF files page by page, either textually or by their appearance. Available prebuilt for Debian, Fedora, Ubuntu, Mac OS X, and Windows, and in source form for other platforms.

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