...Gimp...
12pt Verdana Bold
  Hinting
  Antialiasing
  color: e1e1e1
2x bump map
  Linear
  Compensate for darkening
  Azimuth: 135
  Elevation: 45
  Depth: 3
  X offset: -3
  Y offset: 0
  Waterlevel: 255
  Ambient: 0
Drop Shadow
  Offset X: 2
  Offset Y: 2
  Blur Radius: 5
  Color: 000000
  Opacity: 80
  Allow resizing

Normal: black background
Active: GFlare
  Selector: Default
  Center: (centered)
  Radius: max on slider
  Rotation: 0
  Hue: 0
  Vector Angle: 60
  Vector Length: 1000
  Adaptive supersampling
    Max Depth: 6
    Threshold: 0
Pressed: GFlare
  Selector: Hidden_Planet
  Center: (centered)
  Radius: max on slider
  Rotation: 0
  Hue: 0
  Vector Angle: 60
  Vector Length: 1000
  Adaptive supersampling
    Max Depth: 6
    Threshold: 0

____old___
Xtns->Script-Fu->Buttons->Round Buttons
  Font size: 14
  Font: Sans
  Upper color: ccccea
  Lower color: f7dada
  Text color: 000000
  Upper color (active): ffff00
  Lower color (active): fdd4d4
  Text color (active): 000000
  Padding X: 4
  Padding Y: 4
  Bevel width: 2
  Round ratio: 1.00