elf2efi and peiutil

Here are two more tools that convert to or from UEFI image formats to other formats. There are a handful of others.

elf2efi: convert statically linked ELF binaries to PE images for UEFI
https://github.com/efidroid/modules_elf2efi

PEIUtil: Tool to convert UEFI images from PEI (TE or VZ files) to PE for analysis.
https://github.com/rickmark/peiutil