TreeForm Syntaxtree drawing software is a Linguistic Syntax/Semantics tree drawing editor. Designed for graphical n-ary tree drawing. Mac users can install the software through the new package, but must give authority through "System Preferences" > "Security & Privacy". Windows and Linux users can run the software through the JAR file directly.
FAST(Flowchart Abstract SyntaxTree) SDK is a development toolkit built upon Eclipse RCP and GEF to visualize the process of converting unstructured flowcharts in to structured ones.
Free Open Source VoiceXML editor programmed in Java (Swing). The VoiceXML document is regularly parsed, a tree view is built and syntax errors are reported in a specific table.