Pyrgg is an easy-to-use synthetic random graph generator written in Python which supports various graph file formats including DIMACS .gr files. Pyrgg has the ability to generate graphs of different sizes and is designed to provide input files for broad range of graph-based research applications, including but not limited to testing, benchmarking and performance-analysis of graph processing frameworks. Pyrgg target audiences are computer scientists who study graph algorithms and graph processing frameworks.
An online server that generates different kinds of random data for testing and development - integers, sequences, phone numbers, credit card numbers, names... you name it, they generate it. Has a REST API, 1k hits/month, request a free API key.
Mimesis is a package for Python, which helps generate big volumes of fake data for a variety of purposes in a variety of languages. The fake data could be used to populate a testing database, create beautiful JSON and XML files, anonymize data taken from production and etc.
Chains Invent Insanity is a Cards Against Humanity answer card generator. As the name suggests, it generates cards based on a Markov Chain compiled from a wordlist. This wordlist is comprised of every single (official) answer card ever written for every edition of the game.
Visual CSS selector. Claims that you can turn any website into an API. Enter a URL, pick the parts of the page you care about, and it generates a custom query that gives you JSON with the things you want.
Generate test data, unique ids, passwords, vouchers or other randomized textual data very quickly using a template language. The template language is superficially similar to regular expressions but instead of defining how to match or capture strings, it defines how to generate randomized strings.
Pagan hashes input strings to generate unique avatar images intended for use as profile pictures in web applications. These images can be used to replace default user images for new accounts, or to enhance comment sections by visually representing a user's IP address or username as an 8-bit-like character sprite and not a random blob of pixels (ala the drunken bishop algorithm).
Password wordlist / dictionary generator using song lyrics for targeted bruteforce audits / attacks. Easy to use - you give it an artist, you get back a text file with all of their lyrics to use for cracking passwords. Requires Python2.
A Python package that generates fake data for you. Use to populate databases, spreadsheets, or what have you with plausible looking data. Names, addresses, text... has a plugin system so you can install generators for other kinds of data. There is also a community collection of plugins. Localized. Can be used as a module or a stand-alone tool.