Linked Field allows you to link fields in the field formatter settings. E.g. you have a content type teaser with an image and a link field and you want to link the image to the entered link.
You can either select a field for used for destination or simply enter a token you need (Token support) + HTML attributes for the generated link as well.
This very module creates a block that contains a very easy to use and sexy horizontal accordion (so that what meant the name :o). In there you can put any text you want or an image.
The User Notify module offers a way to tell users about new content. The module tracks a user's viewing history (by cookie for anonymous users) and display links to unviewed/unread content.