The ebar package (a local version of the bar package) is ok for simpler graphs. See The LATEX Companion for more details.
\begin{center} \textbf{CUED Gopher Usage, 1994} \begin{figure}[htbp] \begin{barenv} % set the 'z' axis depth \setdepth{10} %Scale the height \setstretch{.01} % Put the numbers above the bars. Other options include 'empty', \setnumberpos{up} % Set type of x labels (numbers by default) but could also be 'days' \setxvaluetyp{month} % Set the x origin, end, and step size \setxaxis{1}{3}{1}\setxname{Activity} % Set the y origin, end, and step size \setyaxis{0}{10000}{1000}\setyname{Accesses} \ebar{6768}{1} \ebar{9917}{2} \ebar{8306}{3} \end{barenv} \end{figure} \end{center}