Arensito
NeO
Carpalx QGMLWY
Colemak Mod-DH
Maltron Letter Layout
Programmer Dvorak
qwpr
Colemak
Vim Python IDE
Arensito
Vim Python IDENo features have been listed yet.
NeO - NeO is a powerful outliner built for OS X.
Carpalx QGMLWY - A Carpalx variant with V fixed in its QWERTY position.
Colemak Mod-DH - Colemak Mod-DH is a minor modification to the Colemak alternative keyboard layout, moving the heavily-used 'D' & 'H' keys to the bottom row assignments for both index fingers.
Maltron Letter Layout - Also known as "Malt" for short.
Programmer Dvorak - Almost Dvorak, optimized for programming tasks. This layout retains the classic Dvorak number order.
qwpr - Download qwpr keylayout and layout translator for free.