[EM] software

[Dan Keshet]

Does anybody here know of software that accomodates most or all of these 
requests:

- Can accept votes through the web, securely so that it matches users against 
a voter role and only accepts one vote from each user.
- Can accept write-in candidates.
- Can tally votes using IRV.
- Can tally votes using a Condorcet method.

I'm looking for something that's a little more than a one-off script.  
Something that could actually be used to handle repeated elections.

Any leads?

--Dan Keshet