General Knoppix support for those who've read the FAQ at the Wiki
1U BareMetal pfsense opnsense Router Firewall DNS Server 6x 10GB Ethernet Ports
$149.00
Globalscale Technologies DreamPlug AppNeta M22 Linux Server Dual GB Ethernet
$24.99
Custom Server 15" Depth X11SSH-F E3-1270 V6 3.8Ghz 4 Core - 128GB NVME 32GB RAM
$399.00
Globalscale Technologies DreamPlug AppNeta M22 Linux Server Dual GB Ethernet
$21.99
PFSENSE 15" Depth Server Router Firewall Supermicro X11SSH-F E3-1240 V5 32GB RAM
$382.00
IBM E850 Power8 2x 12C 3.02GHz 512Gb 1.8Tb SAS 10GbE 16Gb Linux Server 8408-E8E
$899.95
1U Open Source Router Firewall X10SLH-N6-ST031 E3-1270 V3 6x 10GB Ethernet 16GB
$419.00
1U 10 SFF Bay Supermicro Server X10DRW-iT 2x Xeon E5-2690 V4 128GB DDR4 RAM
$399.00
SQL Server 2022 Standard Unlimited Cores
$508.45
POGO Linux WEBWARE 1150 Rack-Mount Server Pentium 4 2.8GHz 512MB - No Drives
$179.99