For general purposes: HTML/CSS/XML, JavaScript, PHP, Java, C#, C# ASP.NET, and, if I have a gun to my head, Visual Basic. (I HATE VB!)

For purposes of making games:
Things I've seriously considered: C#, Java, VB (my first year of programming courses, when it was all I knew)
Things I've looked into, but decided against: Blender, Adventure Game Studio

Right now, I'm debating the merits of C# and Java, because while I like having RAD with C#, Java is cross-platform, so it's really going to come down to a few factors:

• ease of taking it online
• resource usage
• performance
• ability to keep my resources safe

I'm still in the process of researching these.