website for online petition

I need a website for the purposes of a community project to support better public transport in my area. I want it to be able to record and register users (in a sql database) for the end purpose of generating an online petition. I would also like a section where users can suggest ideas/comments and I can approve them (and edit) after moderation. I would also like another section where users can vote in an online poll (bullet point style) from a number of options and be given a graph to show current results. I'd also like to have IP address unique voting so users cannot vote more than once. Any suggested layout is fine and I would prefer if each page is easily navigated to from one another by tabs. Basic idea of pages below cover page - explains briefly what website is about and side bar for online poll on cover page. secondary page - for more detail and latest news. secondary page - for signing up to petition secondary page - for viewing past online poll results secondary page - for user to suggest ideas and make comments (able to edit and moderate) I will be running the website on a private server (most likely linux like debian or ubuntu) and installing MySQL or similar database myself. I just need the website to be built and I can create the users and get it all going after that. I also will maintain it. Any questions, email me.