irv

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!

Droop STV Election Counter

Open Source voting platform, by the Center for Election Science

Simulating different electoral systems

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

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

A toolkit for alternative voting methods. Initially to support Rankled and Range Ballots for IRV, Boorda, and Pairwise/Condorcet. Future support planned Multi-member methods.

Analysis of multi-pass IRV elections, a problematic multi-winner form of RCV

NSW Legislative Assembly Election Data in PrefLib format.

A visual simulation of four different electoral systems

JS implementation of Single Transferrable Vote (STV) counting

A library of rank voting algorithms

Implementation of paper "Computing the Margin of Victory in IRV Elections" in https://www.cs.cornell.edu/~tmagrino/papers/evt11.pdf

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

I'm publishing source code for my 2 legacy NewGRFs (ERV and IRV) for OpenTTD which I created using grfcodec back in 2007.

A PHP library based on STV.pm by Jonathan Lundell.

2025 New York City Democratic mayoral primary analysis

Instant-runoff voting (IRV) is a voting method used in single-seat elections with more than two candidates.