ECMA International
Ecma International (ECMA) is a standards organization for information communication technology and consumer electronics. It was formerly called the European Computer Manufacturers Association (ECMA). Among other important standards, it is the source for the ECMAScript standard, a scripting language whose best-known dialect JavaScript is used in web browsers the world over.
ECMA manages many of the standards having to do with interoperability of computer software, including the standard specifications for various programming languages such as Algol, FORTRAN, ECMAscript, C#, and the Common Language Interface, or CLI (the virtual manchine underlying C# and many other programming languages).
See Wikipedia's list of ECMA standards for more information.