RetDec - Retargetable Decompiler
Reverse Engineering | ToolA standalone decompiler, built and managed by Avast. Works as a standalone program, has a trial version on the website, and there is an IDA Plugin.
Supported file formats: ELF, PE, Mach-O, COFF, AR (archive), Intel HEX, and raw machine code. Supported architectures (32b only): Intel x86, ARM, MIPS, PIC32, and PowerPC.