The ELF Tool Chain project provides BSD-licensed implementations of compilation tools and libraries for building and analyzing ELF objects. The project began as part of &os; but later became an independent project to encourage wider participation from others in the open-source developer community.

In the last quarter of 2015 The ELF Tool Chain tools were updated to a snapshot of upstream SVN revision 3272. Improvements include better input file validation, RISC-V support, support for Xen ELF notes, additional MIPS and ARM relocations, better performance, and bug fixes.

The ELF Tool Chain project is planning a new release in the first quarter of 2016, which should facilitate wider testing and use by projects other than &os;.