Edb is a system debugger, written by Evan Teran (@eteran). It’s been around for a while, but recently updated to use the Capstone engine, where I noticed it:
Edb is a cross platform x86/x86-64 debugger, inspired by OllyDbg, but aims to function on x86 and x86-64 as well as multiple OS’s. Linux is the only officially supported platform at the moment, but FreeBSD, OpenBSD, OSX and Windows ports are underway with varying degrees of functionality. It is written in C++ using Qt. It contains these plugins: Analyzer, Assembler, BinaryInfo, BinarySearcher, Bookmarks, BreakpointManager, CheckVersion, DebuggerCore, DumpState, FunctionFinder, HardwareBreakpoints, HeapAnalyzer, OpcodeSearcher, ProcessProperties, ROPTool,References, and SymbolViewer.
Some security researchers may not know of OllyDbg, but only of Immunity Debugger (ImmyDbg), which is a fork of the GPL OllyDBg (but Immunity doesn’t seem to provide source…). Edb is also GPL-licensed, but source is easily available, and with Capstone backing it, looks to be very interesting!
https://github.com/eteran/edb-debugger
https://github.com/eteran/edb-debugger/wiki
Firmware Security 