I hope that you are not saying developing those 'apps' like those appear in Apple AppStore or Android Market. Yes I have developed mobile applications. Development machine is a Windows 7 64 bit machine. VS2008. SQL Server also 2008. The mobile is Intermec with OS Windows Mobile 6.5. The mobile application is a mobile point of sale system. My client use the application to select item, enter quantity to sell, save the invoice and print it out. After doing a day's job, my client goes to processing office and upload data. Management can then process data for analysis. That is in.