nescom is a suite of assembler and linker tools for the CPU used in the NES/Famicom. It can produce xa65-compatible relocatable object files, IPS format patches, raw binary images, and ROM images in INES format. nescom is a sister project of snescom, and shares much of the syntax and features.
cencode encodes a stream or a file into quoted c-string escape sequences, suitable for use directly in C code. It is a universal alternative to dedicated export formats like XPM, unportable resource forks, linker flags, and Windows resources where dynamic loading of external data is not possible or undesired.
Erasm++, the Embedded Runtime Assembler in C++, is an Embedded Domain Specific Language (EDSL) in C++ for runtime code generation on Intel 64/IA-32 architectures. It supports complete compile-time syntax checking, and its code generators run very quickly because necessary data are computed statically. Also included are GenericDsm, a fast and generic instruction decoder library which supports "pattern matching" against the decoded instructions, and MetaPrelude, a Haskell-like lazy metaprogramming library that helps implementing EDSLs in C++.
h2incn tries to directly convert C/C++ headers to Nasm-style include files, and can be used in a makefile. It is useful if you want to use the same structures or external variable declarations in C and assembler code, and you don't want to use two separate files and update both each time you change something. It is written in a mix of C and C++ code. It currently works for simple files.
PopAsm is an assembler (an assembly language compiler) designed to support the syntaxes of TASM/MASM and NASM, gathering together the best features of each of them. It is intended that it will support all instructions from Intel compatible CPUs, including MMX, 3DNow!, and SSE extensions.