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 - [![Open-Source Software][OSS Icon]](https://github.com/cytopia/devilbox) [Devilbox](https://github.com/cytopia/devilbox) - The devilbox is a modern and highly customisable dockerized PHP stack supporting full LAMP and MEAN and running on all major platforms. The main goal is to easily switch and combine any version required for local development.
 - [![Open-Source Software][OSS Icon]](https://sourceforge.net/projects/diffuse/files/?source=navbar) [Diffuse](http://diffuse.sourceforge.net/) - Diffuse is a graphical tool for comparing and merging text files. It can retrieve files for comparison from Bazaar, CVS, Darcs, Git, Mercurial, Monotone, RCS, Subversion, and SVK repositories.
 - [![Open-Source Software][OSS Icon]](https://www.fossil-scm.org/index.html/dir?ci=tip) [Fossil](https://www.fossil-scm.org) - Self-contained, distributed software configuration management system with integrated bug-tracking, wiki, technotes and web interface.
+- [![Open-Source Software][OSS Icon]](https://gaphor.org) [Gaphor](https://gaphor.org) - A simple and fast software and systems modeling tool.
 - ![Nonfree][Money Icon] [Genymotion](https://www.genymotion.com/desktop/) - Genymotion is a fast third-party emulator that can be used instead of the default Android emulator.
 - [![Open-Source Software][OSS Icon]](https://gitlab.gnome.org/GNOME/giggle/) [Giggle](https://wiki.gnome.org/action/show/Apps/giggle) - Giggle is a graphical frontend for the git content tracker.
 - [![Open-Source Software][OSS Icon]](https://github.com/Gisto/Gisto) [Gisto](https://www.gistoapp.com/) - Gisto is a code snippet manager that runs on GitHub Gists and adds additional features such as searching, tagging and sharing gists while including a rich code editor.