dict.txt: dictionary I found online.

english.txt: backup of /usr/share/dict/words.

download.py: download and save files with Python 3.

jsondb.py: persistent data storage using Json.

lines.py: low-memory file-traversal, line-by-line.

obfuscate_mail.py: converts text to HTML-entity, useful for preventing email spam.

timedelta.py: natural-language distance between dates.

dice.py: cryptographically provably-fair dice game.

scrypt.py: scrypt hash-computation times.

cidr.py: generates a list of IPs from a cidr range, useful for firewalls.

color.pl: outputs 256-colors, for testing your terminal.

image_offset.py: centers a rectangle within a rectangle; I use it for editing in Blender.

pwd.py: generates a psuedo-random string.

time_to_frame: converts a timestamp to a video frame position; I use it for editing in Blender.