JStart gives the ability to start Java class files (or applets) by double clicking on them from the desktop like any executable program. You only have to assign *.class files to this program. It loads a class file, investigates it according to the Java Sun class file specification, extracts the full class name (including packages), and invokes the main method of that class.
gentoo is a file manager that uses the two-pane concept and is somewhat inspired by DOpus. It strives to be very configurable and lets you do all of the configuration from a GUI within the program itself. Filesystem access is done through the GIO virtual file system layer whenever possible. Using advanced file typing and styling systems, gentoo determines how to display files in its listings, and also how to act on them. The package includes a set of over 120 unique handcrafted icons for many different types of files.