Bubbles which is well known desktop client and which can help you yo track your facbook, flickr, zoho, gmail, yahoo, netvibes and etc sites and providing notifications from these sites and that should in your desk pc. Just it will manage your works in deskop.
Such as you’re gmail user and you can create a shortcuts on to your desktop just like as other files. And just click on the gmail file and you can checkout your newest mails. When you’re working or busy or you’re out of gmail, on that time gmail will work on icon try and you can get notifications when you got mails.