Hey!
I know I might not seem like a coder, but I’m the creator of the infamous GDT Enlightening tool for Game Dev Tycoon, as well as with OpenChat both client and server.
As I needed some sort of save format for GDT Enlightening, I decided to create my own in a seperate library. This is made in Java, but it would be portable to C++ etc. pretty easily. It is already close to finished, and I will provide the repository on here soon!
And here is a very tasty chunch of the code: (Ironic, but it was the only part which looked somewhat proffessional)
If you have any interest for this, let me know 
It will mostly be used by me when it comes to my programs, but it will be released under MIT or WTFPL for your use!
Thanks!