A DOS-based command-line MC68HC11 cross-assembler that can generate
(P&E compatible or ASCII source-level) MAP files, S19, LST, ERR, and
(simple or EM11/Shadow11-compatible) SYM files. Assembles many
files with a single command. Supports upto 100 nested $INCLUDEd
files. Full path error reporting for smart IDEs. Includes extra
instructions (built-in macros), and several assembler directives for
controlling listing, source-level mapping, tabs, case sensitivity,
extra instructions, etc. Auto-direct mode use without possibility
of errors. Supports conditional assembly with user messages,
errors, and warnings. Will also run under Win3.x, Win95, Win98, and
WinNT in a DOS box or called from another program. Not crippled in
any way.

Freeware with an option to pay!

By Tony Papadimitriou <tonyp@acm.org>
and ASPiSYS Ltd. http://www.aspisys.com