Comparison of assemblers

Columns: Assembler | Operating system | Open source | License | Development active
FASM | Windows , DOS , Unix-like | Yes | BSD | Yes | GAS | Unix-like , Windows , DOS , OS/2 | Yes | GNU GPL | Yes | MASM | Windows , DOS , OS/2 | No | Commercial | Yes | NASM | Windows , Linux , macOS , DOS , OS/2 | Yes | BSD | Yes | Open Watcom Assembler | Windows , DOS , Linux , FreeBSD , OS/2 | Yes | Sybase Open Watcom Public | Yes | POASM | Windows , Windows Mobile | No | Freeware | Yes | TCCASM | Unix-like , Windows | Yes | GNU LGPL | Yes | Yasm | Windows , DOS , Unix-like | Yes | BSD | No

Example questions:
The x86-64 single target assembler that is included with Microsoft Visual Studio has what type of license ? | The x86-64 single target assembler whose development is not active has a license whose namesake is what operating system ? | The x86-64 single target assembler with a port targeting the ARM architecture has what kind of license ? | Which x86-64 single target assembler runs on an operating system whose codebase has become a part of Apple 's Darwin ?

Answers:
Commercial | Berkeley Software Distribution | BSD | Open Watcom Assembler