The Bitcoin Unlimited project maintains an enhanced version of the Bitcoin Core "Satoshi" client.

The original binaries from the bitcoinunlimited dot info site:

c62727fbe8513bccb8bcfeabbdcdd8c897aae2c2365908f8f45059984a60c7be 1.0.1.3-signed-statement 5faab324ab50e6621b5cc2cf0b82d528e52075a9db401d5b3e4ea10a499ac0bd bitcoinUnlimited-1.0.1.3-arm32.tar.gz 3d603431f3685a10eb2e55080e511024d2562be66de7d89092df8df4e52bb279 bitcoinUnlimited-1.0.1.3-arm64.tar.gz bb5088b8dfb2be930534f1b174279299eec090542fa62fd04fe05eb9d43f14ba bitcoinUnlimited-1.0.1.3-linux32.tar.gz 864908c88d6b9d08c64e46b12acb5c1f8418b0737dfbeffdb8b1c03907892b02 bitcoinUnlimited-1.0.1.3-linux64.tar.gz 588224a2558f026b764ee8583fc3b0c359167357805bb350375d011282cff7d2 bitcoinUnlimited-1.0.1.3-osx64.tar.gz 7e19427a5931278a06cefdea972a674b676bbfeab2816993ab6b530889aeb536 bitcoinUnlimited-1.0.1.3-osx.dmg 94fd5d1bb878ecf3f0f50333e2625f1e6632de7506207f1b5b5dece148c69c73 bitcoinUnlimited-1.0.1.3-osx.tar.gz a8db3159799309439f31e4c60faab0e2ac24819e918f7f3402cec76c0b009d68 bitcoinUnlimited-1.0.1.3-win32-setup.exe e754fdd303cbceb955929e4a1b626d6251a767665c3cea9796426b0f406bdb36 bitcoinUnlimited-1.0.1.3-win32.zip 2fd35bdb9bf50bc78a7cba2ee4890b07475737b2d6d46d22cc68dccae85b9a6e bitcoinUnlimited-1.0.1.3-win64-setup.exe 8e837b44ee71d9c7b6693320e5909cb5cd1f12580e7b828d359828bc8a06d4ee bitcoinUnlimited-1.0.1.3-win64.zip

For additional validation, see the file 1.0.1.3-signed-statement