tabu – Flexible LaTeX tabulars

The pack­age pro­vides an en­vi­ron­ment, tabu, which will make any sort of tab­u­lar (that doesn't need to split across pages), and an en­vi­ron­ment longtabu which pro­vides the fa­cil­i­ties of tabu in a mod­i­fied longtable en­vi­ron­ment. (Note that this lat­ter of­fers an en­hance­ment of ltxtable.)
The pack­age re­quires the ar­ray pack­age, and needs e-TeX to run (since ar­ray.sty is present in ev­ery con­form­ing dis­tri­bu­tion of LaTeX, and since ev­ery pub­licly avail­able LaTeX for­mat is built us­ing e-TeX, the re­quire­ments are pro­vided by de­fault on any rea­son­able sys­tem). The pack­age also re­quires xcolor for coloured rules in ta­bles, and col­ortbl for coloured cells. The longtabu en­vi­ron­ment fur­ther re­quires that longtable be loaded. The pack­age it­self does not load any of these pack­ages for the user.
The tabu en­vi­ron­ment may be used in place of tab­u­lar, tab­u­lar* and tab­u­larx en­vi­ron­ments, as well as the ar­ray en­vi­ron­ment in maths mode. It over­loads tab­u­larx's X-col­umn spec­i­fi­ca­tion, al­low­ing a width spec­i­fi­ca­tion, align­ment (l, r, c and j) and col­umn type in­di­ca­tion (p, m and b). \be­gin{tabu} to spec­i­fies a tar­get width, and \be­gin{tabu} spread en­larges the en­vi­ron­ment’s “nat­u­ral” width.