Jarnal can provide collaborating using a stylus, mouse or keyboard. It is similar to Microsoft Windows Journal and to the earlier Mimeo whiteboarding and Palm notepad applications. It is available for Windows, Linux and Mac OS X. It should run on other platforms that support Java. This program is free and is released under the GNU Public License.
There are four basic kinds of writing tools - the pen, the transparent and translucent highlighters, and the bottom highlighter. Images can also be imported.
 Recommended file associations:
|jarnal file||.jaj||application/jarnal-jaj||java -jar jarnal.jar|
|background file||.jbg||application/jarnal-background||java -jar jarnal.jar -t annotate.jaj -b|
|metadatafile||.jmf||application/jarnal-meta||java -jar jarnal.jar -m|