Alphabetical page listings

Hi,

I’ve got a page that’s listing a certain selection of posts on my site which is now getting very long (one long list).

Does anyone know of a free plugin that allows you to create an alphabetised list which enables you to specify the posts under each letter?

And/or a plugin that creates clickable A-Z letters that creates a list underneath of the pages associated with that letter, or takes people to a new page?

Many thanks,
Adam