Enigma Virtual Box vs papaw

Enigma Virtual Box packages an application's files and registry into one executable for Windows. It is intended for creating portable applications and supports x86 32-bit and x64 64-bit binaries, including EXE, DLL and OCX formats. It can virtualize DLLs, ActiveX/COM objects, media and text files. Virtualized file operations are emulated in process memory, so temporary files are not extracted to the hard drive; virtual files can also be compressed to reduce the application's total size. ActiveX/COM components can be registered without administrator privileges. The maker says packaging requires no source-code changes: select the main executable, add files or directories, then process them. The download page lists version 11.30 as freeware with a size of 7.5 Mb, and the product page lists Windows 2000 through Windows 11. The maker cautions that the utility does not provide sufficient protection for virtualized files and recommends Enigma Protector for that purpose. It is free, with no registration or payment required.

papaw is a Linux executable packer for programs that include statically linked third-party components, aimed at devices with limited disk space. It compresses executables and bundles them with a decompressor of about 15–40 KB. Supported algorithms are LZMA2, LZMA1, Zstandard and Deflate, and packed executables can replace themselves on disk when run. The project is free and unencumbered software under the MIT license, and can be self-hosted. It uses Meson and can be included as a Meson subproject; the README recommends `custom_target()` for running `papawify`. Prebuilt static binaries are available through GitHub releases, with example assets for aarch64, arm, armeb, i386, mips, mipsel and x86_64. To support portability, the project avoids machine-specific assembly and newer system calls such as `fexecve()`. Optional very basic anti-debugging protection is intended to discourage trivial reverse-engineering techniques. The payload is extracted to a temporary file; when run as root, papaw mounts a tmpfs filesystem and lazily unmounts it before extraction.