One of the big improvements in Jelly Bean was the ability to let your phone or tablet convert your speech to text.
Phones have done that for a while now, but it generally meant sending your input over the air, doing the decoding in the cloud, and showing the result on your device.
Android can now do the text generation itself -- which makes it a speedier process, and possible even without an Internet connection.
Head over to "Language and Input" in the Settings app, then choose "Download offline speech recognition" under the "Voice Search" heading.
You'll be prompted to download a language pack for each language you want Android to recognize; once that's done you'll be able to dictate text even if Google's servers go down or you've got poor reception.

Default Equalizer for Android.
Android's built-in Music app is pretty capable -- and for Jelly Bean users (both 4.1 and 4.2), you'll find the ability to equalize your music has been baked right in. Once you're playing a song, hit the three dots in the upper-right corner and select "Equalizer." You'll be able to select from presets such as "Folk" and "Heavy Metal," and you can even drag the five sliders yourself to fine-tune based on what you're listening to at the moment.
Down below are extra controls: drag to adjust the amount of bass boost applied.
There’s also a "3-D effect," some software processing that makes the music sound a little deeper. Those options are only available when headphones are plugged in, since they wouldn't make much of a difference to the sound quality of your phone's built-in speaker.

Why, we should use adb ?
 

Some devices, like the Galaxy Nexus and the HP Touchpad* (via the custom Android ROMs) don’t
expose themselves as USB storage devices. They instead use MTP or PTP to transfer media files (limiting to only photos and audio/video files being shown from the device). This happens due to there being no separate sdcard on these devices, and ‘unplugging’ an sdcard from a running device to be exposed to the connected computer could cause running apps on the device itself to malfunction.

How to use adb ?

You need - 

-MTP device
-A pc
-Adb drivers (Link for samsung MTP/ADB devices)
-Adb.zip (Get Here)
-Usb cabel

Its very easy (without any software)

-Unzip adb.zip.
-Put the folder into C drive.
-Install drivers for your device.
-Open command prompt.
-Type cd "adress of adb"

To copy a file from the computer to an android device connected via usb, use this in command prompt-

adb push /path/to/local/file /mnt/sdcard/path/to/file

This will copy the local file to the device in the specified location.

To copy files from device to pc. It will place the file in the folder of adb.

adb pull /mnt/sdcard/"file name with ext."

(Leave a comment if you get any problem)

CloudSend are whatsapp apps That is used for sending any type of file through any messenger but it is used extensively for android.But for this app to work You need to have dropbox installed on your android.the link of both the apps are given below just download it and install it. From Below :- 

1. Download  Dropbox      Here
2 Download  CloudSend   Here

* After Installing  Dropbox and CloudSend on your Android device Open Cloudsend and start setup.

                      


* CloudSend will ask you to link it with your Dropbox account. Without any hassle, allow it.

* Now you have completely setup the sharing process.

* Now Navigate to the file you wish to share with your friends.

* Long tap on the file and chose share option. Share it with CloudSend.

 

















  * CloudSend will upload the selected file on Dropbox. Wait for the upload process.    

   * As soon as upload completes, you’ll get the notification on the notification panel. This 
       notificationis containing the sharing link.

   *Press the notification and you’ll be prompted to share file link via option. Share it via WhatsApp or any other messaging client with the person you wish to share the file with.

Ya its possible!!.but only on your own phone so you can troll them by using it.

This is how you do it

-Step 1. Choose a picture for your friend which you want to replace with your friend profile pic and download it.

-Step2. Now Rename the Image with your Friends Mobile Number. For example , i will change it to 98611****** of my friend .

-Step3.Resize the image to 561 * 561 using paint by following these steps:

- Right Click the image and "Open With">Paint
- Press Ctrl + W and check "by Pixels"
- Set the values to 561 Height and 561 Width
- Ctrl + S to Save it.
-Step 4. now just save the image into your device on the path “/sdcard/WhatsApp/Profile Pictures”.

-Step 5. Turn of Wifi or Deactivate data network for a while.(till you prank your friend). as his real profile picture will not Download then

Step 6: Show and Appreciate him for his new profile picture by showing him or say you have his whatsapp hack

(Note :- Its Not a hack but just a prank to fool ur freiends.)00000

Hello geeks today im gonna provide you a nice app that has dual functionality which work as wireless mouse touch pad plus remote control. This apps is very useful for PC holders. The app we are talking about is Mobile mouse lite.Click here to download Mobile mouse lite.

It works on Mac OS X Leopard/Snow Leopard (Intel) or WindowsXP/Vista/Windows 7(32/64bit) or Linux (Ubuntu) and it needs a Mobile Mouse server software that you can download from here.

Some Of Its Features Are:-

• Touch pad (full screen vertical and landscape modes)
• Application notifications
• Remote keyboard
• Modifier Keys
• On screen typing
• Password protection
• Custom sensitivity settings
• Foreign language keyboards
• Supports Bonjour or static IP
• No screen size limitation.Works with multiple monitors.
• Ability to hide keyboard (shake to hide/show)
• Landscape keyboard (shake in landscape mode to show)
• Scroll pad
• Left and Right mouse buttons
• Multi touch gestures (scroll & right click)