Theres hundreds of programming languages available. The more common ones:
C, C++ .. Proper compiled languages, very flexible, used for most traditional applications.
Java .. New(ish), supposedly fixes a lot of the problems in C++.
C# .. A new Microsoft language that does most things C++ does but with nicer structure.
VB .. Old language thats meant for prototyping applications but people use it for real applications instead. Has a bad reputation.
PHP, ASP (vbscript) .. Web oriented scripting languages.
Perl .. Text manipulation language that gets used to make web sites.
SQL .. Database query language
ADA .. Managed code language that produces very robust applications
LISP .. List programming language designed for loop and recursive things like AI.
BlitzBasic, Blitz3D, BlitzMax .. Games programming language thats ace.
Whitespace, Brainfuck .. Interesting languages that are designed to be very difficult to use.
Assembly .. Old school low level stuff.
Theres loads and loads more.