NGASM 8086/8088 Assembler with 8086/8088 Instruction Set Documentation

8086 / 8088 Assembler that simplifies learning assembly language with a 7000-line long manual that elaborately describes exact usage of assembler instructions with lots of small routines and unbelievably tiny ready-to-assemble-and-run programs.

If you are someone who likes to write your own code, you need an assembler. If you wonder who is creating/opening a file, etc, you need to learn none other than assembly language. Because other programming languages conceal code that actually ends up in the executable. And NGASM 8086/8088 Assembler is a very good starting point even for those who threw away an assembler primer.