JComponentBreadboard

Most Java/Swing frameworks strive to be comprehensive. By contrast, JComponentBreadboard aims to support the smallest collection of JComponents and the simplest facilities for composing them into forms, just sufficient to specify the majority of Java/Swing forms. It includes the main capabilities such as simplified layout management, data binding, data validation, but so streamlined that there's much less to think about, and only a 63KB JAR to download.