New in UMLet 9.1 stand-alone and UMLet 9.1 Eclipse plugin
- Improved GUI
- Better Eclipse integration
- Printing
- Code updated to adhere to Eclipse conventions

New in version 9.03 (download..)
- Improved and leaner GUI
- Better custom element support
- Easier start-up
- Better Eclipse integration
- Improved exports to eps and clipboard
- Linux CPU load bug fixed

Attention: this version requires Java 1.6; therefore it has not yet been tested on OS X.

New in version 8.01 (download..)
- New activity diagram with text-based syntax
- Variable font size
- New elements
- Better crop when exporting to clipboard
- String ids in sequence diagram
- Numerous bug fixes

New in version 7.1 (download..)
- Online help
- Element grouping bug fixed

New in version 7 (download..)
- Colors
- Bug fixes

New in version 6 (download..)
- New diagram types

New in version 5.5 (download..)
- Comments in elements
- Callable from command line
- New diagram types
- Interaction frames in text-based sequence diagrams

New in version 5.1
- Bug fixes/custom elements

New in version 5
- Fast, entirely text-based sequence diagram
- File requester remembers location

New in version 4.5
- Support for custom graphical elements

New in version 4
- Support for multiple palette files
- Consistent handling of palette files in plugin and stand-alone mode
- New UML elements (especially activity diagrams)

New in version 3.2 (Note: from this version on, UMLet requires Java 5)
- Support for Eclipse 3
- Leaner file

New in version 3 beta
- EPS export
- Can be used as Eclipse-plugin
- Several fixes

New in version 2
- Bug when saving diagrams with special characters removed (Skøl, Stefan S.!)
- Nicer arrows (Thanks, Bernhard B.)
- Scroll bars
- Scrollable palette
- Palette loads from resource if file is not found
- Better compatibility for different platform
- Copying elements improved
- File name shown in title bar
- Save warning before exiting tool
- Various palette bugs removed
- Lasso selection of multiple elements (Ctrl+Mouse)

New in version 1.8
- UMLet is open source under the terms of the GNU General Public License
- Support for adding new graphical elements
- New XML-based file format
- Aggregation! Composition!

New in version 1.4
- SVG and PDF support
- Improved JPG support

New in version 1.1
- Grid support
- System clipboard (this feature requires JRE 1.4+)
- Finally, relations stick to elements!

New in version 1.0
- Easy editing of element attributes using a text editor panel
- Full fledged undo and redo support
- Right mouse button not needed any more, therefore useable on Windows, Linux, Macintosh OS X and other operating systems
- Support for new diagram types
- JPG export
- Intuitive interface
- Lightweight Java application