SWT
Put Eclipse features to work for you http://www-106.ibm.com/developerworks/opensource/library/os-ecfeat/ Equipping SWT applications with content assistants http://www-106.ibm.com/developerworks/opensource/library/os-ecca/ 後者は色いろと妄…
http://latte.sourceforge.jp/ SWT + draw2d によるUMLモデリングツール。CPL。
http://rssowl.sourceforge.net/