NotifyMe by Nikola Roev

Notifies you of new posts. All requests for post data are made from the browser and all feeds are saved in local storage.

Supports:

Reddit: Get notified when a user posts in a specified subreddit. Uses the Reddit JSON API. Enforces a 1 second timeout between requests. Respects the quota.

RSS: Get notified when there is a new item. Enforces a 1 second timeout between requests.