Apps similar to Szyszka include KRename, which is free and open source. Other options are Thunar Bulk Renamer, pyRenamer, GPRename and CoreRenamer. In total there are five File Renamers like Szyszka for Linux.
KRename is a powerful batch renamer for KDE. It allows you to easily rename hundreds or even more files in one go. The filenames can be created by parts of the original filename, numbering the files or accessing hundreds of informations about the file, like creation date or Exif...
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Thunar Bulk Renamer included in the default installation of the XFCE Desktop Environment as part of the Thunar file manager and available as a stand-alone installation in others. It saves the configuration between sessions, and has a very simple to use GUI interface.
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pyRenamer is a batch renamer for GTK desktops. With pyRenamer you can change the name of several files at the same time easily.
GPRename is a complete batch renamer for files and directories and is licensed under the terms of the GNU General Public Licence version 3.
CoreRenamer is a simple batch-renaming application and a handy tool for people who have to regularly handle a large number of files by renaming them.
