To create your own IM Bot you need to have some very basic programming skills. You can use any programming language, I prefer PHP. You also need to have web space to host your bot.

For example, I have created a Twitter Bot that can be used to tweet in your twitter account using any IM client.

If you like to write a personal IM bot, just follow these simple steps:

Step 1: Register at Imified

Step 2: Create your Bot which is just a simple script which resides on your webserver. It can be in any programming language.

Step 3: Copy the path of your script in the clipboard shown below.

Your Bot is ready to serve now.

The script I wrote is self-explanatory.
Just Add Tweetbot@bot.im in your IM client to try it.

//Twitter.PHP
require('TwitterAPI.php');

if($_REQUEST[('value'.($_REQUEST['step']-1))]=="reset")
{
	echo " start all over again now ";
}

else if($_REQUEST[('value'.($_REQUEST['step']-1))]=="?")
{
	echo " Hi, I am a Twitter Bot, you can tweet and see friend's timeline using me.
 type 'reset' to start again at any stage.";}

else{

	switch ($_REQUEST['step'])
			{
				case 1:
				echo "Enter Twitter UserName:";
				break;

				case 2:
				echo $_REQUEST['value1'];
				echo ",Enter Your Password, dont worry I dont store your password:";
				break;

				case 3:
				echo "Thankyou for submitting details
                                        Type 'tweet' to post a tweet and 'friend' to see friend's timeline";
				break;

				case 4:
				if (trim($_REQUEST['value3']," ")=="tweet")
				{
					echo "Enter Message to tweet";
				}

				else if($_REQUEST['value3']=="friend")
				{
					echo "I am working on this function, will publish it soon";
				}
				else
				{
					echo "enter correct choice ";
				}
				break;

				case 5:
				$result=tweet($_REQUEST['value1'], $_REQUEST['value2'], $_REQUEST['value4']);
				echo $result;
				}

}

No, This is not the only code you require. We need to use Twitter API as well, I have put that code in a seprate file.
You can make a number of Applications using different Open APIs

//TwitterAPI.php
function tweet($username,$password,$message)
{

// The twitter API address
$url = 'http://twitter.com/statuses/update.xml'; 

// Set up and execute the curl process
$curl_handle = curl_init();
curl_setopt($curl_handle, CURLOPT_URL, "$url");
curl_setopt($curl_handle, CURLOPT_CONNECTTIMEOUT, 2);
curl_setopt($curl_handle, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl_handle, CURLOPT_POST, 1);
curl_setopt($curl_handle, CURLOPT_POSTFIELDS, "status=$message");
curl_setopt($curl_handle, CURLOPT_USERPWD, "$username:$password"); 

$resultArray = curl_getinfo($curl_handle);

    curl_close($curl_handle);

    if($resultArray['http_code'] == "200")
		{
    $result="Yipee, Check your profile ";
		}
	else
		{
		 $result="Error , Username or Password is not correct ";
		}
	return $result;
}

Learn How To Use Imified API
Happy Coding!

I see they have put a great deal of effort to make searching for Trains (in India) a pleasure experience through their website. You need to open an online account with them and start searching and booking the trains. You can customize your search and can even see the route on map. There possibly will be other website which might be providing this type of service, but they are yet to be explored.

Train Route (Punjab - Mumbai)

I’ve been using the Indian Railway official website to search and book but it seems that the private players are a step ahead to provide easy service that make sense. Here, IRCTC (read it as “Indian Railways Catering and Tourism Corporation Limited”) is doing the right thing to allow the other service providers/vendors to search through the reservation database. I’m waiting for a stiff competition between various online service providers in near future and I’m sure this will bring out something that is useful, more personalized, and easy for users.