Growl for Windows is a Windows-compatible version of Growl , a notification system for Mac OS X.Discontinued
The project is no longer developed. Last version, 126.96.36.199, released in March 2012, can be still downloaded from the official website and GitHub
Specto is a desktop application that will watch configurable events (such as website updates, emails, file and folder changes, system processes, etc) and then trigger notifications. For example, Specto can watch a website for updates (or a syndication feed, or an image, etc)...Discontinued
The program is not actively maintained anymore. Last version, 0.4.1, released in August 2011, can be still downloaded from the official website.
Notifo is a mobile notifications platform empowering developers to build their own services with a scalable and reliable notifications API. The Notifo API is a simple and affordable way to add notifications to any web app or project.Discontinued
Notica lets you send browser notifications from your terminal to your desktop or phone. No installation or registration is required.