Thanks!

It would have been much harder to create Dirigible without a bunch of great Open Source projects, and we'd like to take this opportunity to say "thanks!"

The most visible projects we use are:

• Michael Leibman's excellent SlickGrid, an essential part of a programmable cloud spreadsheet.
• Almost as important for the programmable part is the Ajax.org Cloud9 Editor, aka ACE.
• Dirigible is, of course, programmable in Python.

There are tons of great Open Source libraries for Python, and we've made sure that some of the best are pre-installed:

• NumPy, the fundamental package needed for scientific computing with Python.
• GmPy, provides multiprecision arithmetic
• MpMath, another library for multiprecision floating-point arithmetic.
• The SciPy library, providing scientific tools for mathematics, science, and engineering.
• PyCrypto, the Python cryptography toolkit.
• SqlAlchemy, a Python SQL toolkit and object relational mapper.
• LXML, for working with XML and HTML.
• xlrd, for reading Excel files.
• RDFLib, for working with RDF.
• GeoPy, a geocoding toolbox.
• Beautiful Soup, a forgiving HTML parser for real-world web pages.
• Mechanize, stateful programmatic web browsing.

Less directly visible to users, our server-side stack includes many open source components, including:

• Debian the GNU/Linux operating system on which it all runs.
• Apache, the world's most popular web-server.
• Modwsgi for Apache, connecting our web server to Python.
• Django a Python web framework.
• Django-registration, making it easy for users to sign up to Dirigible.
• setuptools, The Python library to install Python libraries.

Finally, back at the coal-face, our programmers use many development tools and libraries, the most prominent of which are:

• Unittest2 and Mock, indispensible Python testing libraries by eminent Resolver Systems alumnus Michael Foord.
• Ply, by David Beazley, allows us to parse our customised Python grammer for cell formulae.
• Chardet, by Mark Pilgrim, is a godsend for discerning unicode encodings.