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TreeForm Syntax tree 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. All users must have Java 8 or higher installed. https://java.com/en/download/
DiDraw is a general purpose vector graphics drawing program. It is very easy to use even for novice users and still provides some advanced features. It is written in Java and runs on any platform supporting Java 1.3 or higher.