The developers of FreeBSD have made available the FOURTH BETA for version 11.0. Additional changes as noted by Phoronix are improvements to NUMA, networking, ARM support, Bhyve virtualization, and LLVM Clang 3.8 as default compiler. Download the ISO/update file here.

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A summary of changes since 11.0-BETA3 includes:

o The mtx_trylock_spin(9) kernel synchronization primitive was added.

o The machdep.disable_msix_migration loader tunable has been re-enabled
  for EC2 AMIs.

o The iwm(4) and iwmfw(4) drivers have been updated.

o The new system hardening options have been fixed to avoid overwriting
  other options selected during install time.

o Several build-related fixes.

o Several miscellaneous bug fixes.

A list of changes since 10.0-RELEASE are available on the stable/11
release notes:

    https://www.freebsd.org/relnotes/11-STABLE/relnotes/article.html

Original announcement: https://lists.freebsd.org/pipermail/freebsd-stable/2016-August/085186.html

Softpedia – FreeBSD 11.0 Is Getting Closer and Closer, Fourth Beta Is Out for Public Testing

DistroWatch – Development Release: FreeBSD 11.0-BETA4

Phoronix – FreeBSD 11.0 Has Been Pushed Back By One Week