Part of the GNU toolchain, often used with arm-none-eabi-objdump -d file.elf to disassemble ELF files or objdump -b binary -m arm for raw binary.
Developed by the NSA, this open-source tool is highly rated for ARM analysis. It provides a powerful disassembler and a decompiler that can reconstruct ARM code into C-like pseudocode, often more effectively than paid alternatives. (Professional Standard): hex to arm converter