Visual COBOL supports development on Windows, Linux, and Unix platforms. It allows distributed development using Developer Hub and supports mainframe development with tools like CICS, PL/I, and JCL. Visual COBOL can generate native code, MSIL code, or bytecode and supports deployment to Windows, Linux, Unix, and z/Linux environments. It provides a way for organizations using COBOL to modernize applications and deploy them to Java or .NET platforms.