Java, C, C++ and perl source code implementing election methods including Borda, Condorcet, Raw Rated, Approval and Instant Runoff voting.
I've moved hosting to code.google.com, go here:
Voting Software on Google Code
| Documentation | Java | C | C++ | perl |
|---|---|---|---|---|
| Virtual Round Robin (Condorcet) | Java | C | C++ | perl |
| Instant Runoff Normalized Ratings (IRNR) | Java | C | C++ | perl |
| Instant Runoff Voting (IRV) | Java | C | C++ | perl |
| Raw Rating Summation | Java | C | C++ | |
| Single Transferrable Vote (STV) | Java | C | ||
| Histogram (for data display) | Java | C | C++ | perl |
The Java library is currently most tested because I have been using it to develop the Servlet based Election Calculator and BetterPolls.com.
Each implementation includes a command line utility for processing url query formatted vote data.
All sources copyright Brian Olson. Free for non-commercial use. Licence for other use negotiable.
See also this comprehensive python single transferrable vote (STV) implementation.