After a long pause, there's finally a new release of Tiled. We also released two tutorials on the website. Changes include:

• Configuration defaults to preset values, Tiled should now work fine if there is no initial config file
• Layer rotation and flipping
• Map resizing (warning: cannot be undone yet)
• Custom properties on tiles and map
• A file filter on loading and saving for .tmx and .tsx
• Several UI improvements (usage of JSplitPane and JSpinner for example)
• Small changes to the map format*
• Implemented a better underlying architecture for Maps and Brushes
• Fixed several null pointer exceptions
• Added an Ant build target for tiled-core.jar, for use in Java engines
• Support for other than 2:1 isometric tile ratios (2:1 and 1:1 tested)
• Fixed redo for painting operations (paint, fill, erase)
• Improved undo/redo of layer organisation changes

*) Map width/height are now attributes of the map element instead of a seperate dimensions element. Also, Tiled now correctly wraps unencoded layer data in a data element.