My keyboard layout

My keyboard layout is basically Colemak with Mod-DHk, keeping most of the local Finnish symbols from the fi keymap in place.

I've moved many AltGr bindings to a more comfortable location. Caps Lock (locked) and Super (latched) have been moved to better locations as well.

By pressing AltGr, you get the symbols in the lower right of each key.

┌─────┐
│Caps │
│ Lock│
└─────┘
┌─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┲━━━━━━━━━┓
│ ~   │ !   │ "   │ #   │ $   │ %   │ &   │ /   │ (   │ )   │ =   │ ?   │ Å   ┃         ┃
│ `   │ 1   │ 2 @ │ 3 £ │ 4 € │ 5   | 6   │ 7   │ 8   │ 9   │ 0   │ +   │ å   ┃    ⌫    ┃
┢━━━━━┷━┱───┴─┬───┴─┬───┴─┬───┴─┬───┴─┬───┴─┬───┴─┬───┴─┬───┴─┬───┴─┬───┴─┬───┺━┳━━━━━━━┫
┃       ┃ Q   │ W   │ F   │ P   │ B   │ J   │ L   │ U   │ Y   │ Ö   │     │ ^   ┃       ┃
┃ Tab   ┃ q < │ w > │ f = │ p ← │ b → │ j   │ l   │ u [ │ y ] │ ö   │ Esc │ ^   ┃ Enter ┃
┣━━━━━━━┻┱────┴┬────┴┬────┴┬────┴┬────┴┬────┴┬────┴┬────┴┬────┴┬────┴┬────┴┬────┺┓      ┃
┃        ┃ A   │ R   │ S   │ T   │ G   │ K   │ N   │ E   │ I   │ O   │ Ä   │ *   ┃      ┃
┃ Ctrl   ┃ a _ │ r - │ s / │ t ? │ g ↑ │ k   │ n { │ e ( │ i ) │ o } │ ä   │ '   ┃      ┃
┣━━━━━━┳━┹───┬─┴───┬─┴───┬─┴───┬─┴───┬─┴───┬─┴───┬─┴───┬─┴───┬─┴───┬─┴───┲━┷━━━━━┻━━━━━━┫
┃      ┃ Z   │ X   │ C   │ D   │ V   │     | M   │ H   │ ;   │ :   │ _   ┃              ┃
┃Shift ┃ z | │ x \ │ c : │ d ; │ v ↓ │Super│ m   │ h   │ ,   │ .   │ -   ┃     Shift    ┃
┣━━━━━━┻┳━━━━┷━━┳━━┷━━━━┱┴─────┴─────┴─────┴─────┴─────┴────┲┷━━━━━┷┳━━━━┻━━┳━━━━━━━┳━━━┛
┃       ┃       ┃       ┃                                   ┃       ┃       ┃       ┃
┃ Ctrl  ┃ Alt   ┃  Alt  ┃                Space              ┃ AltGr ┃       ┃ Ctrl  ┃
┗━━━━━━━┻━━━━━━━┻━━━━━━━┹───────────────────────────────────┺━━━━━━━┻━━━━━━━┻━━━━━━━┛

Usage

X11

Copy the file akheron to /usr/share/X11/xkb/symbols.

Activate the layout: setxkbmap -rules evdev -model pc105 -layout akheron -variant '' -option '', or just setxkbmap akheron.

To make the changes persistent, add the following to /etc/X11/xorg.conf, or /etc/X11/xorg.conf.d/00-keyboard.conf

Section "InputClass"
    Identifier "akheron"
    MatchIsKeyboard "on"
    Option  "XkbRules"         "evdev"
    Option  "XkbModel"         "pc105"
    Option  "XkbLayout"        "akheron"
    Option  "XkbVariant"       ""
    Option  "XkbOptions"       ""
EndSection

macOS

Open the akheron.bundle folder in Keyboard Installer, install for the current user. Open Settings -> Keyboard -> Input methods and find select the Colemak - akheron layout under the the Finnish language.