Hi,
I've published at Github my last work: AbstractMem library
Feel free to use/play with it
I developed it because I needed a native source code solution to store data and work with it (indexed data) at my project "PascalCoin" blockchain (third party solutions like SQLite or DLL's where forbidden)
If your app needs a way to work with large amounts of data on demand (do not need to call "load" or "save") then this can help you.
https://github.com/PascalCoinDev/AbstractMemFree to use under Mozilla 2.0 License