I use WP-Syntax to highlight my code samples on this blog and I keep having to Google and go to the wp-syntax website to get the correct lang attribute value to put in my <pre lang="blah"></pre> tags

So here they are

abap, actionscript, actionscript3, ada, apache, applescript, aptsources, asm, asp, autoit, avisynth, bash, bf, blitzbasic, bnf, boo, c, cmac, caddcl, cadlisp, cil, cfdg, cfm, cobol, cpp-qt, cpp, csharp, css, d, delphi, diff, div, dos, dot, eiffel, email, fortran, freebasic, genero, gettext, glsl, gml, bnuplot, groovy, haskell, hq9plus, html4strict, idl, ini, inno, intercal, io, java, java5, javascript, kixtart, klonec, klonecpp, latex, lisp, lolcode lotusformulas, lotusscript, lscript, lua, m68k, make, matlab, mirc, mpasm, mxml, mysql, nsis, objc, ocaml-brief, ocaml, oobas, oracle11, oracle8, pascal, per, pic16, pixelbender, perl, php-brief, php, plsql, povray, powershell, progress, prolog, providex, python, qbasic, rails, reg, robots, ruby, sas, scala, scheme, scilab, sdlbasic, smalltalk, smarty, sql, tcl, teraterm, text, thinbasic, tsql, typoscript, vb, vbnet, verilog, vhdl, vim, visualfoxpro, visualprolog, whitespace, winbatch, xml, xorg_conf, xpp, z80

I think I've only used perl, vb, dos, javascript, kixtart and bash so far

WP-Syntax is based on GeSHi