Gnome Nautilus do that kind of virtual folders through saved search. But I want a system-wide solution, not a gnome-wide solution.
Is there a tool that creates virtual folders from the concatenation of multiple search queries (the result of multiple
find commands ?). The solution should index files for better performances and you should be able to define the default folder for copy operations.
Is there any existing solution to this problem (involving no development from my side) ?