SpaceFM is a multi-panel tabbed file and desktop manager for Linux with built-in VFS, udev- or HAL-based device manager, customisable menu system, and bash integration. SpaceFM aims to provide a stable, capable file manager with significant customisation capabilities.

A fully customizable file manager! By "fully" I truly mean it - you can edit everything. Choose what is seen on the sidebar - devices, shortcuts, tree view? Or nothing, leaving the whole window for managing files. Click on any toolbar button or bookmark to set its shortcut. Set custom icons for bookmarks. Format or backup devices. But the most important feature is custom commands. For a tutorial, we will be adding a command to move all selected pictures to the Pictures folder. Right click on any file, then on Copy, choose New, and click Command. For its name, type "Move to Pictures folder". The actual command will be "mv %F /home/hackerman/Pictures" (of course replace hackerman with your real username). Now you have to choose upon which conditions the command will appear. For that, go to the Context menu, and choose rule "MIME type" "equals". Inside the textbox, type "image/jpeg", and click Add. That will display the command for every jpeg file. Now do the same but with "image/png" and "image/gif". Voila! Now, every time you right click an image (or many), there will be an option to put it (them) in an appropriate place. Note: if there are multiple files, all of them have to fit the command's requirements. So if you select 100 files, of which 99 are images and one is a music file, the command will not appear. Anyway, that's the power of SpaceFM. Our command is pretty basic, but the possibilities are endless. Works with GTK2.