*Note: I take no credit for [this answer as it was posted by elementaryosnewbie on Reddit][1]. Thought it'd be best to have this on the Elementary OS Stack Exchange. Big thanks to him for sharing it. If this has already been posted I apologise for the double post.*

How it looks: [Image 1][2], [Image 2][3], [Image 3][4]

1. Open file manager up as administrator and go to: /usr/share/themes/name-of-your-theme-folder/gtk-3.0

2. Place the icon you want to use in that folder.

3. Make sure the icon has proper permissions by right clicking on it, choosing properties > more > and making it 644-777 (read, write, and executable by owner, group, everyone) or else wingpanel may not load. (Alternatively you could issue `chmod 777 <icon name>.svg`)

4. Open up /usr/share/themes/name-of-your-theme-folder/gtk-3.0/apps.css in Scratch, scroll down to the panel settings, find .panel-app-button, and change what's in the {brackets} to what's below. (Default theme: /usr/share/themes/elementary/gtk-3.0 )

    .panel-app-button > GtkWidget > GtkWidget:first-child { padding: 0px 24px 0px 0px; font-size: 0px; background-image: url("icon.svg"); background-repeat: no-repeat; }

5. Change the background image url to the name of the icon that you placed in the gtk-3.0 folder. The padding above is adjusted for a 24x24 icon but you can adjust it to fit something bigger/smaller/wider, just change "24px" to the width of your image.

6. In terminal type: killall wingpanel to see the changes.

**Some icons you may like**

elementary icons:

1. https://heathpaddock.com/wp-content/uploads/2014/01/elementary-white.svg
2. https://heathpaddock.com/wp-content/uploads/2014/01/elementary-black.svg

**other icons you may like**

1. http://i.imgur.com/X649wp6.png - bullseye icon 
2. http://i.imgur.com/Ru5nQc1.png - apple icon

**Search google for more** 


  [1]: https://www.reddit.com/r/elementaryos/comments/3fzd6s/tutorial_how_to_replace_the_applications_text_on/
  [2]: http://%20http://i.imgur.com/mexSh3a.png
  [3]: http://i.imgur.com/WmWj0tH.png
  [4]: http://i.imgur.com/jMVJfms.png