Jitbit CRM is built with ASP.NET - an awesome web-development framework created by Microsoft. The CRM application is programmed in C#, which, according to Stackoverflow stats, is the most popular programming language on the planet.
In case you want to customize our .NET CRM with new features required for your company, and you have your own ASP.NET developers, you can easily do so by buying the source-codes license, not just the compiled app. We tried to keep the code well-commented and as simple as possible. The source code license comes as a Visual Studio solution file that contains the CRM "web-application project".
Even if you don't plan modifying the CRM app, ASP.NET is still the best choice if you're running on Windows platform. It is fast, scalable and reliable. Our ASP.NET CRM will easily integrates with your Active Directory catalog and uses Microsoft SQL Server to store the data.