[paulddraper]

> Can you elaborate on what you mean by this?

I'm 100% certain the OP meant "resources for writing cross-platform desktop apps".

> write your core functionality in a language that can target multiple platforms...write platform-specific wrappers around it

This is nearly always suggested by someone who has never attempted this.

There is a reason there are mountains of Windows-only or Mac-only software out there.

[seandougall]

> This is nearly always suggested by someone who has never attempted this.

Oh, I've done it, and seen it done many times—it all depends on what the application is attempting to do. If the goal is something platform-specific enough that this approach doesn't work well, then something like Electron generally doesn't seem to either.