Commodore Basic and text editor. It can edit Commodore Basic PRG, text, asm, d64, data files. Basic tools - Find text - Goto, Renumber , Insert Characters - D64 manipulation, load save rename - Decimal to Hex, assembly frontend.
SAsmE is a cross-platform lightweighted Asmeditor for Microchip PIC18 mcus. A translation unit that converts in a few seconds brainstruggling asm source code to human readable pseudo-code. It can save hours when analyzing asm assemblies.
A assembler plugin for Eclipse, to use different assembler-programs (e.g. NASM, TASM or MASM) as back-end compiling. It include linker and debugger controlling, too. And you get a optimiced ASM-File-Editor with this plugin.
Z80 ASMeditor that gives you real-time info about Mnemonics, Waitstates/Clock cycles, and Labels. Features code completion, real-time debugging and T-states profiling.
Microdev is a complete development tool dedicated to microcontroller based boards. It is composed of a graphical and real time simulator and a full featured editor supporting Picbasic, JAL and Asm.
ASM68000 is a usefull editor to write ASM code for TI89 calculator. It is a simple IDE written in TCL/TK, so it works with the TCL/TK interpreter. You can found it at the adress www.sun.com/960710/cover/dltcl.html. I hope it will help you in your ASM prog