I occasionaly use database applications on my mobile devices, primarily for tracking my paid time off and for making gift lists. Many enterprise users need a database program that provides lots of functionality and that works with desktop solutions like Access (bi-directional conduit support in HanDBase). One of the most powerful, yet easy-to-use programs I have tried on my devices is HanDBase and it was just updated to version 4.0. I am getting ready to kick off two big projects at work and plan to try tracking them with HanDBase on my devices. There are over 2,000 databases already created by users that you can use or even download and modify for your own customization on the HanDBase site. Check out the press release for all the details.
Check out the What's New page to see the long list of security features, synchronization improvements, and interface improvements across all platforms. There are also performance improvements, customs forms support, and other bug fixes in this latest version. Prices range from US$19.99 for Symbian versions up to US$39.99 for Windows Mobile, Palm OS, and BlackBerry versions (these are the Professional versions with more functionality). You can also try out HanDBase before you buy and if you are looking for a mobile database application I highly recommend you give it a try.