http://www.muktware.com/bitsnbytes/2983
I worked on the story and found oss is only a smoke screen. The entire UID project seems to be a pure Microsoft stack.
This document provides step-by-step instructions to install the AADHAAR Enrolment Client and Biometric components needed for Biometrics capturing. The document is not intended to be a user manual for the AADHAAR Enrolment Client. The application has been built to work with the given pre-requisites.
1.1 Installation Pre-requisites • Operating System: Windows XP SP3 OR Windows 7 (only 32-bit editions) • Windows Installer 4.5 • Microsoft .Net Framework 3.5 SP1 • Microsoft SQL Server 2008 R2 Express • Aadhaar QSS SDK Setup • Vendor Device Manager
You can see how the UID project has made Microsoft technologies mandatory. You can't use it without Microsoft. There is no mention of Linux in this important document.
That clearly states that other than the already popular and powerful open source technologies such as Apache and MySQL rest of the stack is proprietary. Calling UID/Aadhar and Open Source project is like calling a Tata tractor a Mercedes just because one of its four tyres is a Mercedes tyre.