Aelora

Adds a list of any attached files to the end of posts and pages.
Attached files are displayed with a link so that they can be easily downloaded, along with a 16×16 icon identifying the type of file and file size.
Thanks to <a href="http://www.famfamfam.com/" rel="nofollow ugc">Mark James</a> for the outstanding silk icon set, and for licensing it under the CC license.

rAttach

Adds an attached files list to the end of posts and pages

Palasthotel

greatestview

This plugin redirects attachment pages to the post, where they are placed (via 301). If there is no parent page, it redirects back to the WordPress home URL (via 302).
Further, when editing a post, the option to link images to their attachment page is hidden via CSS (except it is selected by default).

Disable Attachment Pages

Redirects attachment pages to the post, where they are placed, and hides backend option to link images to attachment page (if not default).

rAttach vs Disable Attachment Pages