FlatAnimatedLafChange: Animated Laf changing.
FlatInspector: A simple UI inspector that shows information about UI component at mouse location in a tooltip.
FlatSVGIcon: An icon that displays SVG using svgSalamander.
TriStateCheckBox: A tri-state check box.

Download

FlatLaf Extras binaries are available on JCenter and Maven Central.

If you use Maven or Gradle, add a dependency with following coordinates to your build script:

groupId:     com.formdev
artifactId:  flatlaf-extras
version:     (see button below)

Otherwise download flatlaf-extras-<version>.jar here:

You also need flatlaf-<version>.jar and svgSalamander-<version>.jar, which you can download here: