3 ms·FL Studio is written in Delphi and the UI is very snappy and modern with a lot of animations.by udbhavs 4y agoFL Studio is written in Delphi and the UI is very snappy and modern with a lot of animations.p_l 4y agoDelphi always had a very good and fast UI library, the only complaint in the older days was that it made for big binaries because VCL would get statically linkedzeroc8 4y agoYes, but a big binary means 1MB. Nowadays a Helloworld webapp needs more.