Is there any maven plugin - or non-maven tool - out there which would browse a multi-modules project and return me a list of all existing JUnit testcases (ideally presented
There's a .../target/maven-status/maven-compiler-plugin/testCompile/default-testCompile/inputFiles.lst
in a Maven project.
You can use the GMavenPlus Plugin and Walking the File Tree to gather these files and put their content where you want.
Another option is to develop an own Maven plugin that does the same.