What is the apps for the the two icons shown What apps are icons shown on the 3rd icon from the left (a icon that look like a bug with an android head) and the 5th icon from the left (a icon with a phone in between two zig-zag)?
The first one you asked about means the phone is connected in debug mode to a computer:
  

and the phone between zig-zag lines means it's on vibration mode.