Deark

Deark is a portable command-line utility that can decode certain types of files,
and either convert them to a more-modern or more-readable format, or extract
embedded files from them. It also has an option (-d) to display detailed
information about a file’s contents and metadata. It’s free and open
source.

It's been compiled for both 32bit and 64bit AROS PC architectures (*).

Among the formats supported (in one way or another) are:

Acorn Sprite
Amiga icon / NewIcons / GlowIcons
AMOS sprite/icon/picture bank (ABK)
ANI (Windows animated cursor)
ANSI Art
AppleDouble/AppleSingle
ArcFS
BinHex (HQX)
BLOAD/BSAVE
BMP
Compress (Unix legacy .Z format)
cpio
D64
DS_Store
Encapsulated PostScript
EPOC MBM / Sketch / AIF
EXE
FON / FNT (Windows font)
GEM Bit Image
GIF
GRASP GL
gzip
HFS
HLP
ICO / CUR (Windows icon/cursor)
ILBM (IFF image)
ISO 9660 (CD-ROM image)
JPEG
JPEG 2000
MacBinary
Mac icon (icns)
MacPaint
Mac resource
Matroska
Microsoft Compound File / OLE / Thumbs.db
Microsoft Paint
MP3 / ID3
Nokia Phone image formats (NGG, NLM, NOL, NPM, NSL)
Ogg
OS/2 Icon / Pointer / Bitmap array
PackDir
PaintShop Pro Browser Cache (pspbrwse.jbf)
Palm OS Bitmap (BitmapType)
Palm OS ImageViewer
Palm OS PDB and PRC
PCPaint PIC / CLP
PCX
PICT (Macintosh)
PPM / PAM / etc.
PSD
Psion PIC
Psion APP / IMG / OPA / OPO
RPM
SIS (EPOC/Symbian installer)
Spectrum 512
StuffIt
T64
TGA
TI-83/89/92/etc. calculator pictures
TIFF / Exif
WMF / EMF
WMV / WMA / ASF
WRI (MS Write)
XBIN
X-Face
ZIP
Zoo

(*) NOTE: 64bit version works on x86-64 AROS from july 2019. It might need to be
recompiled afterwards, if ABI changes.