This question has come up a number of times before. Unfortunately, it's not easy to Super Search because of the many ways to phrase it. Here is a list of relevant nodes, posted not least as future reference for myself:

• SQuirreL Monks
• Insert Language Here Monks
• Off Topic: Java Monks, continued...
• life beyond PerlMonks?
• Perl monkish sites
• (OT)C++Monks?
• PHPMonks?
• OT: Is there a UnixMonks.com?
• Python Monks?
• C++monks?
• Sites similar to Perl Monks, but not about Perl?
• OT: JavaJunkies (Javamonks sorta)
• MathMonks?
• OT: Monks, C/C++ edition? – this thread
• Are there PM-like sites for java, python?
• (OT)Python monks?
• Is there a Javamonks?

I’ll occasionally update this.

Makeshifts last the longest.