ISO Master is an easy to use GUI CD image editor for Linux, BSD, and Windows. Basically, you can use this program to extract files from an ISO, add files to an ISO, and create bootable ISOs, all in a graphical user interface. It can open both ISO and NRG files, but can only save as ISO. It is based on bkisofs, a library for reading, modifying, and writing ISO images.
BytesFall Explorer (bfExplorer for short) is a Web-based file manager. It allows you to upload, download, view, edit, copy, move/rename, and change permissions of a single file/directory or a group of files/directories. It's also possible to create files and directories and execute shell commands. An SQL engine is used to store the users for the authentication (currently MySQL and PostgreSQL are supported). It has an interface similar to Windows Explorer.
nautilus-follow-symlink is a nautilus extension that adds a context menu entry to nautilus on symbolic links pointing to directories, which once clicked opens the pointed directory (the real path) in a window. It does so both when right clicking on the folder icon or on the contents of an opened symbolic link.