Facebook,Yahoo,Gtalk,MSN,MYSPACE.etc.--LOGIN Together

You can log in to Facebook,Yahoo,Gtalk,MSN,MYSPACE.etc together in one time..You can chat here without log in to facebook.if you use many software to chat,,it will slow down your PC.but if You use Nimbuzz software, you can make your pc more faster.U can also Make VOICE CALL with this.it will give you mail notification also.
Download the software and install easily.

Download link : http://www.nimbuzz.com/en/get/nimbuzz.

Use G-mail in Offline

You can use g-mail without using g-mail.for this you have to download a google gear programme  from here-http://gears.google.com.now log in to gmail and got to settings/Labs tab and enable the offline access for Gmail dialogue box and click next.then select the shortcuts and click ok.then download will start.then go to "Go into Flaky Connection Mode".and now you can easily your gmail id information only by clicking on the shortcut without using internet.