Twitter's official tweet button is here, you can find the button on the page http://twitter.com/goodies/tweetbutton ,
You can get a small button like the one below

I have used AVG antivirus and cloud panda antivirus, and iam recently using Kaspersky commercial anti virus, All of which have been quite good products, there are however times, where you need extra security from other viruses, this is where a free online service from VirusTotal comes into reckoning.

1. Create a new message with scan@virustotal.com as the destination address.
2. If you wish to receive the results as plain text, write SCAN in the subject field. If you wish to receive an XML attachment with the results, write SCAN+XML in the subject field.
3. Attach the file to be scanned. Such file must not exceed 20 MB in size. If the attached file is larger, the system will reject it automatically.

Or, Use a small uploader utitlity from http://www.virustotal.com/advanced.html#uploader

Or, Use the browser addons for Firefox or Chrome http://www.virustotal.com/advanced.html#browser-addons

Google now offers a new tool as a piece of javascript which can be added to your site or blog.

The code to add this useful tool can be found at http://translate.google.com/translate_tools?hl=en&layout=1&eotf=1. Blogger users can use the widget below to add this tool to their blog.

If you thought blogging was an easier way to publish content for the majority of people, consider twitter as a micro-blogging tool. Twitter is one such service which is becoming a rage among bloggers. you come across the twitter gadgets and twitter bookmarks on many popular blogs and websites, which is an indication of growing popularity of twitter. Many of you already know of Twitter and for those who don't know, this is how twitter describes itself.

Twitter is a service for friends, family, and co-workers to communicate and stay connected through the exchange of quick, frequent answers to one simple question: What are you doing?

Twitter has a clean and simple interface, it makes publishing content easier and faster, even simpler than most blogs. once you have registered on-site, you can start posting your updates(not more than 140 chars. at a time), you will eventually get people who will "follow" you around on twitter and make you more popular. Twitter, is the latest tool for blog promotion as well, Register on-site and create your own space on twitter, publish frequent updates using the main site, desktop clients, mobile devices or widgets and gadgets developed by third party and create a fan following, which will send free traffic to your blog.