omega – A wide-char­ac­ter-set ex­ten­sion of TeX

A de­vel­op­ment of TeX, which deals in multi-octet Uni­code char­ac­ters, to en­able na­tive treat­ment of a wide range of lan­guages with­out chang­ing char­ac­ter-set.
Work on Omega seems, more or less, to have ceased: its im­me­di­ate suc­ces­sor was to be the aleph project (though that too has stalled). Projects de­vel­op­ing Omega (and Aleph) ideas in­clude Omega-2 and LuaTeX.