Anonyvoter (https://anonyvoter.com) is a cheap and very simple to use Anonymous Online Voting System.
You can quickly set up a group of voters and enter what they are voting on. You can send out multiple polls at once, or start and end each poll manually.
Anonyvoter copes with First Past the Post, Alternative Voting (Instant Run-Off) and full Single Transferable Vote voting systems.
For just £59 a year you can run up to 200 polls a year for up to 300 voters at a time.
Users don't need to register to vote, they see a screen that is so simple to use.
While people are voting, the administrator (and any nominated observers) can see who has and who has not voted.
Results are displayed immediately the poll is closed, with full breakdowns for IRV and STV votes, and can be exported in several ways.
Anonyvoter is so easy and simple to use. The best online voting service I have seen.
You can access it at https://anonyvoter.com