Handbook of Mathematical Functions: With Formulas, Graphs, and Mathematical TablesVast compendium  29 sets of tables, some to as high as 20 places. 
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Though somewhat dated, this is the goto book for Bessel/Hankel function tables, and tabulations of other important/magical functions like the gamma function, Euler's integral, the hypergeometric function, etc. The functions are always accompanied by a definition of the function, the roots of the function, the approximate representations, tabulated values, and more. The plots still look very funky in their coarse representations, but there are references for almost everything discussed and plotted. Is it prettier than Alpha or Mathworld? No, but the access time to get what you wanted will often be lower with a printed volume like this. Still a useful reference volume.
http://www.math.sfu.ca/~cbm/aands/toc.htm