Below are a bunch of icons released under the WTFPL license. You can download all of them in this archive.
![]()  | 4d_arrows.png | ![]()  | add_plus.png | ![]()  | add_sub.png | ![]()  | after_draw.png | ![]()  | after_screen_draw.png | 
![]()  | alarm.png | ![]()  | angular_grid.png | ![]()  | angular_grid_decrease.png | ![]()  | angular_grid_increase.png | ![]()  | anim_first.png | 
![]()  | anim_frame.png | ![]()  | anim_last.png | ![]()  | arrow_corner1.png | ![]()  | arrow_corner2.png | ![]()  | arrow_corner3.png | 
![]()  | arrow_corner4.png | ![]()  | arrow_down.png | ![]()  | arrow_downleft.png | ![]()  | arrow_downright.png | ![]()  | arrow_exchange_horiz.png | 
![]()  | arrow_exchange_vert.png | ![]()  | arrow_left.png | ![]()  | arrow_right.png | ![]()  | arrow_up.png | ![]()  | arrow_upleft.png | 
![]()  | arrow_upright.png | ![]()  | background.png | ![]()  | backward.png | ![]()  | barrel.png | ![]()  | before_draw.png | 
![]()  | bend_arrow_back.png | ![]()  | bend_arrow_forward.png | ![]()  | bin.png | ![]()  | bitmap.png | ![]()  | box.png | 
![]()  | box_bevel.png | ![]()  | box_cut.png | ![]()  | box_expand.png | ![]()  | box_handles.png | ![]()  | box_hollow.png | 
![]()  | box_subtract.png | ![]()  | brain.png | ![]()  | brush_mold_and_cube.png | ![]()  | bucket.png | ![]()  | bulb.png | 
![]()  | button.png | ![]()  | calendar.png | ![]()  | cards.png | ![]()  | chest.png | ![]()  | circle.png | 
![]()  | circle2.png | ![]()  | clock.png | ![]()  | collision.png | ![]()  | compile_all.png | ![]()  | compile_build.png | 
![]()  | compile_file.png | ![]()  | confirm_ok_done_etc.png | ![]()  | confirm_ok_done_etc2.png | ![]()  | cube.png | ![]()  | cup.png | 
![]()  | database.png | ![]()  | database_export.png | ![]()  | database_import.png | ![]()  | dbarrow_down.png | ![]()  | dbarrow_left.png | 
![]()  | dbarrow_right.png | ![]()  | dbarrow_up.png | ![]()  | delete_close_etc.png | ![]()  | door_closed.png | ![]()  | dot.png | 
![]()  | edit_copy.png | ![]()  | edit_cut.png | ![]()  | edit_paste.png | ![]()  | edit_redo.png | ![]()  | edit_undo.png | 
![]()  | end.png | ![]()  | eye_close.png | ![]()  | eye_open.png | ![]()  | file_export.png | ![]()  | file_new.png | 
![]()  | file_open.png | ![]()  | file_save.png | ![]()  | file_save_all.png | ![]()  | file_save_as.png | ![]()  | filter.png | 
![]()  | filter_add.png | ![]()  | filter_delete.png | ![]()  | finish_flag.png | ![]()  | firstaid.png | ![]()  | flame.png | 
![]()  | folder_flat.png | ![]()  | folder_tree.png | ![]()  | forward.png | ![]()  | friction.png | ![]()  | fully_outside.png | 
![]()  | gamescene.png | ![]()  | gamescenegray.png | ![]()  | gear1.png | ![]()  | gear2.png | ![]()  | gem.png | 
![]()  | globe.png | ![]()  | gravity.png | ![]()  | greenman.png | ![]()  | grid1.png | ![]()  | grid2.png | 
![]()  | grid3.png | ![]()  | grid_decrease.png | ![]()  | grid_increase.png | ![]()  | group_add.png | ![]()  | group_delete.png | 
![]()  | hand.png | ![]()  | handstop.png | ![]()  | heart.png | ![]()  | heart1.png | ![]()  | heart2.png | 
![]()  | help.png | ![]()  | horiz_arrows.png | ![]()  | incline.png | ![]()  | info.png | ![]()  | key.png | 
![]()  | key_char.png | ![]()  | key_press.png | ![]()  | key_release.png | ![]()  | keyhole.png | ![]()  | lasso.png | 
![]()  | layer.png | ![]()  | lever.png | ![]()  | line.png | ![]()  | link.png | ![]()  | magnify_glass.png | 
![]()  | measure_tool.png | ![]()  | mesh.png | ![]()  | monster1.png | ![]()  | monster2.png | ![]()  | monster3.png | 
![]()  | mouse.png | ![]()  | mouse_left.png | ![]()  | mouse_middle.png | ![]()  | mouse_motion.png | ![]()  | mouse_motion1.png | 
![]()  | mouse_motion2.png | ![]()  | mouse_right.png | ![]()  | objects.png | ![]()  | oven.png | ![]()  | pacmangame.png | 
![]()  | page1.png | ![]()  | partially_outside.png | ![]()  | pause.png | ![]()  | pawn.png | ![]()  | pen.png | 
![]()  | pencil.png | ![]()  | play.png | ![]()  | play_reverse.png | ![]()  | pointer.png | ![]()  | pointer2.png | 
![]()  | project.png | ![]()  | property.png | ![]()  | puzzle_piece1.png | ![]()  | puzzle_piece2.png | ![]()  | puzzle_piece3.png | 
![]()  | quit.png | ![]()  | record.png | ![]()  | rectangle.png | ![]()  | rectangle2.png | ![]()  | redman.png | 
![]()  | rename.png | ![]()  | render_solid.png | ![]()  | render_textured_lit.png | ![]()  | render_textured_unlit.png | ![]()  | render_wire.png | 
![]()  | replace.png | ![]()  | room.png | ![]()  | rotate.png | ![]()  | scale.png | ![]()  | screen.png | 
![]()  | screen2.png | ![]()  | screen3.png | ![]()  | screen4.png | ![]()  | screen_dark.png | ![]()  | script.png | 
![]()  | sel_edge.png | ![]()  | sel_face.png | ![]()  | sel_vertex.png | ![]()  | selectrect.png | ![]()  | shells.png | 
![]()  | shotgun.png | ![]()  | small_sheet.png | ![]()  | solid_brush.png | ![]()  | spawn.png | ![]()  | speak_bubble.png | 
![]()  | speak_bubble_blue.png | ![]()  | speaker.png | ![]()  | speaker_vol1.png | ![]()  | speaker_vol2.png | ![]()  | speaker_vol3.png | 
| sprite.png | sprite2.png | ![]()  | stairsboth.png | ![]()  | stairsdown.png | ![]()  | stairsup.png | ||
![]()  | start.png | ![]()  | start_flag.png | ![]()  | steps_both.png | ![]()  | steps_left.png | ![]()  | steps_right.png | 
![]()  | swaplink.png | ![]()  | swapsmooth.png | ![]()  | tag.png | ![]()  | target.png | ![]()  | things.png | 
![]()  | thought.png | ![]()  | tilex.png | ![]()  | tiley.png | ![]()  | unlink.png | ![]()  | vert_arrows.png | 
![]()  | view_front.png | ![]()  | view_perspective.png | ![]()  | view_side.png | ![]()  | view_top.png | ![]()  | zoom_in.png | 
![]()  | zoom_out.png | ![]()  | zoom_reset.png | ![]()  | sheet.png | ![]()  | sheet2.png | ![]()  | sparkle.png |