| Theme | Source | Graphical? | Base | Notes | License | Author |
|---|
| alt | built-in | no | | | Tcl | |
| aqua | built-in | native | | Mac OS X only; Native Mac OS X | Tcl | |
| aquablue | external | yes | clam | Oddly, there is no blue involved | | |
| aquativo | external | yes | | GTK aquativo | | Andrew Wyatt, Pat Thoyts |
| arc | external | yes | default | Good for Linux; Modern scrollbar look with no up/down arrows | | Sergei Golovan |
| black | external | no | clam | | | Mats Bengtsson |
| blue | external | yes | | This one is blue; Button gradient creates an illusion that the buttons are not square | | Pat Thoyts |
| blueelegance | external | yes | | GTK2 Blue Elegance Light; No blue; Odd button graphics | | |
| clam | built-in | no | | | Tcl | |
| classic | built-in | no | | | Tcl | |
| clearlooks | external | yes | clam | GTK Clearlooks; Good for Linux | | |
| default | built-in | no | | | Tcl | |
| gtk2 | external | yes | clam | X11 Only; defColor, xtk::theme (1) | | Jürgen "Arthur" Beyersdorff |
| keramik | external | yes | alt | | | Pat Thoyts |
| keramik_alt | external | yes | alt | | | Pat Thoyts |
| kroc | external | yes | clam | Orange | | David Zolli |
| plastik | external | yes | default | | | Pat Thoyts |
| radiance | external | yes | clam | | | |
| rivet2d | external | yes | clam | X11 Only; defColor, xtk::theme, xtk::theme::rivet | | Jürgen "Arthur" Beyersdorff |
| rivet3d | external | yes | clam | X11 Only; defColor, xtk::theme, xtk::theme::rivet | | Jürgen "Arthur" Beyersdorff |
| radiance | external | yes | clam | | | |
| tk | external | yes | clam | X11 Only; defColor, xtk::theme (1) | | Jürgen "Arthur" Beyersdorff |
| vista | built-in | native | | Windows only; Native Windows | Tcl | |
| waldorf | external | yes | | 2016 | | François Tonneau |
| winnative | built-in | native | | Windows only; Old-Style Windows theme; Native Windows | Tcl | |
| winxpblue | external | yes | clam | GTK WinXP Blue | | Pat Thoyts |
| xpnative | built-in | native | | Windows XP only; Native Windows | Tcl | |
