The NCASE M2 is an offshoot of the M1EVO, which wasn’t well received by the SFF PC community and ultimately was discontinued. The M2 is the case we should have gotten with the M1 EVO.
SSUPD Meshroom S v2
SSUPD Meshroom S is a 14.9L vertical sandwich layout SFF PC case with an all mesh external design and successor to the well received Meshlicious case. The case leans more towards liquid cooling with limited CPU air cooler clearance compared to standard reference layout cases of similar volume.
DAN C4 SFX v2
The Dan C4-SFX v2 will be 13.88L in volume and will support only Mini-ITX motherboards, has support for 280mm liquid coolers, 145mm air coolers and 3.7 slot full length graphics cards.
SGPC K39
K39 is sub 5L Mini-ITX case. The 4L K39 v2 was discontinued and replaced by 5.2L K39 v3. Version 3 is only available in white. K39 v3 is still one of the best SFF cases in the 5L category due to its entry price and hardware compatibility.
IQUNIX ZX1
The ZX-1 is aluminium unibody frame Mini-ITX case starting 9.2L internal volume for the air cooling version and 10.6L for the liquid cooling version. Case pricing starts at US$219 and ships to most countries
Fractal Terra
Fractal Terra is a small aluminium sandwich layout Mini-ITX case at 11.4L in volume. It features swing arm, quick release side panels and adjustable internal spine for better hardware compatibility. It’s priced at US$179 and availability in most regions.
Fractal Ridge
Fractal Ridge is console layout Mini-ITX case at 12.6L in volume. The case uses steel construction and comes in black or white variants. The Ridge is priced at US$129 / £129 and available from numerous retailers.
McPrue Apollo S
The McPrue Apollo S V5 is 21L ITX/mATX case with large GPU and CPU cooler support. Case pricing starts at US$470 and is available in space black, space grey or silver with optional accessories available.
FormD T1
FormD T1 is widely considered one of the best small for factor PC case for both versatility and compatibility, while still coming in at under just 10L in volume. The case provides satisfying build experience and multiple configurations, such as air cooling, AIO and custom liquid cooling.
Densium 4+ v2
Densium 4+ v2 is 5.5L Mini-ITX case, constructed of aluminium, stainless steel, with woodgrain front panel design. The Densium 4 and 4+ v2 cases are only available from Overtek.