I’ve rewritten my library for creating Excel add-ins for the n-th time: xlladdins.com. Let me know what you think.
The biggest change is that it now uses UTF-8 so you don’t have to deal with multi-byte (ASCII) character sets vs Unicode (UTF-16, UCS-2) pain. Everything gets converted to whatever makes Excel happy. Hopefully that makes you happy too.
If you have issues please post them to GitHub Issues. It’s not that I prefer the evil, money grubbing, GitHub capitalists to the evil, money grubbing, WordPress capitalists, I just like having things in one spot and I’m on GitHub more regularly.
Disclaimer: This is at the Minimum Viable Product stage so please don’t use it in production unless you need to get fired.