Actively maintained

For Drupal 6 (might work for D7?)
The Custom Node Access module provides hook_node_access_custom().

Add custom access callbacks to node/[nid]

Example:

This module implements correct daylight savings handling and overrides Drupals own timezone handling.

Organic Groups Private Content is a simple access control module for Organic Groups. It allows users with the 'access private group content' permission to set content within a group as private. Private content is then only accessible to people with the same permission.

Intended Use Case: If you are using OpenAtrium or OrganicGroups to manage projects between an agency and clients, you can use this module to create content that only agency members can view (similar to the way Basecamp from 37Signals behaves).

Recommended

• Module Grants
• Features

Installation

1. Install as usual, see http://drupal.org/node/70151 for further information.
2. To use with Team Notifications checkboxes, please:
   • enable the notifications_team_users_custom feature in Features UI
   • go to Message & Notifications > Notificataions Settings > Team UI and set "VIEW FOR USER SELECTION" to notifications_team_users_custom

Configuration
* Configure user permissions in Administer > User Management > Permissions

Back in 2006 (Drupal 4.7) I wrote a module for the automatic unpublishing of events after the date had passed.

This is a module that pulls car fuel ratings from the New Zealand Govt website.

This module has also been built for WordPress and Codeigniter