So far I've tried out a few things, but for some reason they don't "feel" the same as Delphi did. Maybe it's because I'm older and have moved on to different tools, or maybe it's because I haven't made the time to properly invest in these.
Anyways, here's what I've played with:
- NetBeans - Has a form builder, I'm comfortable with Java, it's cross-platform enough. I'm not sure why I've never used it for my personal GUI apps, even though I've built a bunch of little things to use for work.
- SharpDevelop - Looks great, checks all the boxes for doing GUI development, but I'm not comfortable enough with C# or VB.NET to use it effectively.
- Lazarus - Currently playing with this now. Feels a lot like Delphi (as it should!). I'm disappointed in how much Object Pascal/Delphi I've forgotten though. It brings back a lot of good memories though.