Versatile PHP election engine (library & CLI) with a high-level API. Handles everything from the simplest use cases to advanced options and simulation tools. Supports 20+ native Condorcet-like voting methods (extensible), scales from small polls to billions of votes in resource-constrained environments. Rigorously tested and documented.

PyRankVote is a python library for different ranked-choice voting systems, like IRV, STV and PBV. Created in June 2019.

A rust library for tallying votes

Voting systems comparison website. Simulate a single election in dozens of different voting methods including plurality, borda count, instant runoff, bucklin, copeland, and many more!

Election Simulator 3000: Monte Carlo simulations of voting methods and metrics under different voter models

The reference implementation of the single transferable vote (STV) system used for student government elections at Carnegie Mellon University.

Ranked choice voting javascript/typescript library

A Julia package for simulating and analyzing rank choice voting systems.

Run ranked voting contests using data from Google Forms or a Discourse forum

A program for comparing electoral systems. Supports instant-runoff voting, first-past-the-post, the Borda count, and more.

This plugin allows sorting a list of options by preference of the user, instead of just selecting one.

CiviCRM extension which provides election functionality, including nominations, candidates and voting to CiviCRM.

Voting method exploration/simulation tool

IRV algorithm with a "no endorsement" option

JS implementation of Single Transferrable Vote (STV) counting

A library of rank voting algorithms

The elections site for the Stuyvesant High School Student Union. Made with Next.JS, MongoDB and GraphQL

Simulate elections using Google Forms and Sheets

Vote tallying tool that ranks the winners by Instant-Runoff (IRV) rules. Intended for use with Louisiana Youth & Government conference elections.