looking for an editable regions plug-in

Home pages frequently contain more than one type of content. I;m working on a home page that has three columns: posts are in the main column, and there’s the typical sidebar with categories, tags, etc. However, I also need a third column with several elements that the client will need to be able to update. I don’t think that custom fields will work because I want to be able to style the elements individually. I also need to be able to include html and javascript code in these elements. One element includes a Google map and the other includes an email newsletter sign-up form.

You can view the home page with the content in place, but right now the left column elements are not editable in the admin:
https://www.hollywoodfarmersmarket.org/wordpress

I looked at a lot of plug-ins like Flutter, The Other Content and Page.ly MultiEdit. I tried Page.ly, and it works, but only in Visual Editor mode, not HTML mode. It also required making the home page a Page with a custom template and then my posts didn’t show up anymore and there was a main content area that I don’t need (or want content to show up in).

So, I need a tool that lets me have additional editable regions, lets me style the text with CSS, and also lets me add html/javascript code. And I need this to be on the home page, which right now is an index.php blog-style page that is not editable in the Admin area.

Any ideas? Has anyone used a plug-in that will allow for all of these requirements?