To make the transition to Colemak easier there are 5 layouts used commonly - there is a whole discussion here about the many layouts and variants here.
Add each layout configuration section to file /usr/share/X11/xkb/symbols, and make sure you declare each layout in file /usr/share/X11/xkb/rules/evdev.xml: in the appropriate language.
//
// Portuguese Tarmak 5th level.
// This is a Tarmak-based layout, designed for the Portuguese language and customized
// for portuguese keyboard layouts.
//
partial alphanumeric_keys
xkb_symbols "pt-tarmak5" {
include "latin(type4)"
name[Group1]="Portuguese (Tarmak 5)";
key <TLDE> { [ backslash, bar, notsign, notsign ] };
key <AE03> { [ 3, numbersign, sterling, sterling ] };
key <AE04> { [ 4, dollar, section, dollar ] };
key <AE11> { [ apostrophe, question, backslash, questiondown ] };
key <AE12> { [ guillemotleft, guillemotright, dead_cedilla, dead_ogonek ] };
key <AD01> { [ q, Q, at, Greek_OMEGA ] };
key <AD02> { [ w, W, lstroke, Lstroke ] };
key <AD03> { [ f, F, f, F ] };
key <AD04> { [ p, P, paragraph, registered ] };
key <AD05> { [ g, G, tslash, Tslash ] };
key <AD06> { [ j, J, leftarrow, yen ] };
key <AD07> { [ l, L, downarrow, uparrow ] };
key <AD08> { [ u, U, rightarrow, idotless ] };
key <AD09> { [ y, Y, oslash, Ooblique ] };
key <AD10> { [ ccedilla, Ccedilla, thorn, THORN ] };
key <AD11> { [ plus, asterisk, dead_diaeresis, dead_abovering ] };
key <AD12> { [ dead_acute, dead_grave, dead_tilde, dead_macron ] };
key <BKSL> { [ dead_tilde, dead_circumflex, dead_grave, dead_breve ] };
key <AC01> { [ a, A, ae, AE ] };
key <AC02> { [ r, R, ssharp, section ] };
key <AC03> { [ s, S, eth, ETH ] };
key <AC04> { [ t, T, dstroke, ordfeminine ] };
key <AC05> { [ d, D, eng, ENG ] };
key <AC06> { [ h, H, hstroke, Hstroke ] };
key <AC07> { [ n, N, dead_hook, dead_horn ] };
key <AC08> { [ e, E, kra, ampersand ] };
key <AC09> { [ i, I, lstroke, Lstroke ] };
key <AC10> { [ o, O, dead_acute, dead_doubleacute ] };
key <AC11> { [ masculine, ordfeminine,dead_circumflex, dead_caron ] };
key <AB01> { [ z, Z, guillemotleft, less ] };
key <AB02> { [ x, X, guillemotright, greater ] };
key <AB03> { [ c, C, cent, copyright ] };
key <AB04> { [ v, V, leftdoublequotemark, leftsinglequotemark ] };
key <AB05> { [ b, B, rightdoublequotemark, rightsinglequotemark ] };
key <AB06> { [ k, K, k, K ] };
key <AB07> { [ m, M, mu, masculine ] };
key <LSGT> { [ less, greater, backslash, backslash ] };
include "level3(ralt_switch)"
};
Find the windows installers in the windows directory.
Find the mac OS installers in the mac directory (created with Ukelele).