KingSplash is a dedicated selective desaturation and colorizer app for Instagram users. Now sharing your beautiful selectively colored images with instagram is just a button click away. By the way more than anything it allows you to add the labels to your image, isn't it awsome?. You may ask what is the catch?, nothing, it is just a FREE APP with lot more features than any other paid apps of this type, but you will need to live with the ads.No matter how big is the image it lets you generate the same size image with the effect.It is fully integrated to social networks like Facebook. 
Features 
1. Selective desaturation and selective coloring 2. Colorize or Recolor. Pick the color you like and paint your photos, check out the screen shots to fell what you can do with this app 3. Add Labels to your images, once again screenshots will show you what you could achieve. 
4. Get the images from your Facebook Album, Facebook Profile Photo, Photo Album, and Camera 
5. Upload your work to Instagram, Facebook Wall, Facebook Albums, Phone Album, Email and Clipboard
 6. Supports Undo with unlimited(until memory is full in your device) number of levels 
7. Can save as many projects as you want 
8. Multiple resolutions to choose while Uploading your images,check out the screen shots to fell what you can do with this app 
9. Copy the image to the clipboard and use it where ever you want
 10. Zoom In, Zoom Out and Pan using your two fingers, make your life easy to work to details of the image
 11. Use the Brush size that works for you
 12. Can see the brush tip while working on the image, so that it will be easy for you while working on the image
 13. And it is free