Artwork
Here some artwork, for some guidelines to make Icons in FreeCAD see Gui Command.
Icons
Part icons
Draft icons
View icons
Zoom icons
File:View-zoom-selection.svg
File:View-zoom-border.svg File:View-zoom-all.svg
Tree Icons
File:Tree Mesh.svg
File:Tree Selectable.svg File:Tree Unselectable.svg
Other/General Icons
Application icons
Icons for making desktop or start menu shortcuts...
File:FreeCAD-icon01.png File:FreeCAD-icon02.png File:FreeCAD-icon03.png File:FreeCAD04.png File:Freecad04.svg
Splash screens
The splash screens listed here are in .png format. To use them, you must convert them to .xpm, rename them (both filename and inside the file), and recompile FreeCAD.