Welcome to OpenPave.org, the home of open source pavement engineering software. Open source software allows you, the user, to access the source code for your software so that you can both see how it works and change it to better perform the tasks for which you are using it. This is particularly valuable in engineering where you often need specialized software for particular tasks. Ordinarily this would mean having to code your application from scratch, hence the proliferation of small programs which are essentially the same. With open source you can benefit from building on a tested base, and all for free!
A 64-bit version is now available! This should work with Office from Office XP through Office 2013 on both 32-bit and 64-bit versions. This also includes some fixes and speed improvements. The spreadsheet has also been updated with more error checking. You should check out the Excel spreadsheet, or join a mailing list.
For you, the developer, open source gives you the ability to implement your ideas without building from scratch, and to benefit from the changes of other developers. This is particularly valuable for students wishing to explore new algorithms, and for researchers looking to calibrate models without the expense of developing from scratch.
At the moment there is not a lot of code available through OpenPave.org, but it is hoped that this will change quickly! OpenPave.org code is not intended to compete with commercial offerings, and currently only includes the calculation 'engines', and no user interface code.
OpenPave.org code is distributed under the Academic Development and Distribution License, which is similar to the Mozilla Public License (which is used by the Firefox webbrowser), with an added clause requiring that code used for academic publications be distributed.