Kick Assembler (written in Java language) is the combination of an assembler for doing 6510 machine code and a high level script language.

8/9-2011 : New beta release (v3.20 & v3.21):

• Made mnemonic extensions to force all addressing modes.
• Corrected bug in error message when forcing an illegal addressing mode.
• Made mnemonic extensions so you can force addressing modes. ‘.z’ and ‘.zp’ forces zeropage, ‘.a’ and ‘.abs’ forces absolute. Eg. lda.abs $0000
• Made .importonce directive to ensure libraries only gets included once.
• Corrected typo in error message. Thanks to Tlr for pointing this out.