The main ones are:
- ld - the GNU linker.
- as - the GNU assembler.
But they also include:
- addr2line - converts addresses into filenames and line numbers.
- ar - a utility for creating, modifying and extracting of archives.
- c++filt - filter to demangle encoded C++ symbols.
- gold - a linker for ELF files.
- nm - lists symbols from object files.
- objcopy - copys and translates object files.
- objdump - displays information from object files.
- ranlib - generates an index to the contents of an archive.
- readelf - displays information from any ELF format object file.
- size - lists the section sizes of an object or archive file.
- strings - lists printable strings from files.
- strip - discards symbols.