pyenv lets you easily switch between multiple versions of Python. It's simple, unobtrusive, and follows the UNIX tradition of single-purpose tools that do one thing well. Forked from rbenv. Implemented entirely with shell scripts - you don't need Python to run this tool. Manage the system default Python version as well as per-project Python environments.
If eval "$(pyenv virtualenv-init -)" is configured in your shell, pyenv-virtualenv will automatically activate/deactivate virtualenvs on entering/leaving directories which contain a .python-version file that contains the name of a valid virtual environment.
A web application that sits in front of a command line Signal client that lets you send messages from a web browser. Seems to also have a REST API. Requires a second phone number to set up an account, it's not an extension to an existing Signal setup. Looks like all-Docker-all-the-time but it looks like you can also run it as a system service (a systemd .service file is in the docs, and it says nothing about using Docker for that).
A command that can be used on a Linux machine if you're running Gnome to delete the oldest image and movie thumbnails in your desktop's cache to reclaim disk space. I run this command once a month as a cronjob.
A suite of shell scripts to automate the installation and configuration of FreeBSD in such a manner as to support anonymity and security. Helps with the rapid deployment of BSD machines that can then be used as Tor nodes, hidden service providers, and locked-down desktop machines.
software opensource github freebsd anonymity security scripts installer tor
A page describing how to use IP tables on a Linux machine to set up a captive portal that also does traffic shaping to maximize the amount of bandwidth available. With a tarball of downloadable scripts.
ipset scripts traffic-shaping iptables captive-portal howto linux software Byzantium
An attempt to archive movie scripts (and probably transcripts) from all across the Internet into a single site for students and academics to reference. Perhaps you're bored and are looking for something to read at work one day... fairly well populated when I added this link.
A shell script which can be used to automate the backup of virtual machines running in a XenServer environment. It's specifically written for XenServer v5.5, and I think it'll run reasonably well on top of XenServer v6.1 (I THINK).