A small GTK program that loads a list of classifiers from PyPI, displays them in a list with checkboxes. The user can then check any number of checkboxes and the program will generate code suitable to copy & paste into a setup.py script.
pypi-classifiers has three dependencies: GTK, Glib and requests. Most Linux desktop-oriented Linux distros ship these as packages, which are often installed by default. Beyond this, the script is self-contained; instead of installing into a virtualenv, it maybe possible to just copy pypi-classifiers somewhere and run it:
./pypi-classifiersInstallation from PyPI works as well (and will install the potentially missing requests dependency), although Gtk should be installed using your distributions package manager (remember to toggleglobalsitepackages).