Comment by ThinkBeat
5 days ago
Delphi is the easiest and most integrated way of writing cross platform UIs and it has been for a lot of years. It might not be sexy, but highly productive.
You can download and use a community edition of Delphi for free. The downside is insane licensing costs if you are making commercial software.
I an not sure how far Lazarus has come but I believe it to have the same or similar abilities and if free and libre.
I use Delphi at work quite a lot. The language is great, but the Embarcadero Studio is unfit for any non-trivial project and getting worse with every new version.
Nowadays I definitely prefer Lazarus.