Some Best Themes

[haneetsp]

1. Nova launcher
2. action launcher 3
3. miui
4. pixel launcher
5. google now launcher

[thilak.kmb]

There is another excellant Launcher. Total Launcher.
Though it is paid only, some of the themes here are really wonderful and there are dozens available for free, apart from many paid themes. Every theme is unique not just change of color and wall paper. The entire layout will be different with each theme. You have to 'work' to make some themes functional. Many people may not go for it becuase of this. Give it a try.