Awesome

Syncthing-GTK

GTK3 & Python based GUI and notification area icon for Syncthing

Supported Syncthing features

Everything what WebUI can display
Adding / editing / deleting nodes
Adding / editing / deleting repositories
Restart / shutdown server
Editing daemon settings

Additional features

First run wizard for initial configuration
Running Syncthing daemon in background
Half-automatic setup for new nodes and repositories
Nautilus (a.k.a. Files), Nemo and Caja integration
Desktop notifications

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Packages

Ubuntu, Debian, deb-based distros: in OpenSUSE Build Service.
Arch Linux: In [community] repository
Fedora: search for syncthing-gtk in Software Center
SUSE (and other rpm-based distros): in OpenSUSE Build Service.
Flatpak (distro-agnostic): in Flathub
Windows: Get latest installer from here, or use the Chocolatey package.
Or, in worst case scenario, download latest tarball, extract it and run syncthing-gtk.py.

Dependencies

python 2.7, GTK 3.8 or newer and PyGObject
python-gi-cairo, gir1.2-notify and gir1.2-rsvg on debian based distros (included in PyGObject elsewhere)
python-dateutil (Python 2 version)
python-bcrypt
setuptools
psmisc (for the killall command)
Syncthing v0.13 or newer

Optional Dependencies

libnotify for desktop notifications.
nautilus-python, nemo-python or caja-python for filemanager integration
this Gnome Shell extension, if running Gnome Shell
gir1.2-appindicator3 (part of libappindicator), if running Gnome Shell or Unity

Windows Building Dependencies (you don't need to install these just to run Syncthing-GTK)

Python for Windows 2.7
PyGObject for Windows with GTK3 enabled (tested with version 3.14.0)
python-dateutil (Python 2 version)
Python for Windows Extensions
WMI
NSIS2 with NSISdl, ZipDLL and FindProcDLL plugins (optional, for building installer)

Related links