The Aurora is the newest DAC/Amp combo by a Chinese manufacturer Yulong. It's designed around the latest ESS ES9068AS chip, also offering a Class-A headphone amplifier. It's priced at $520.
The SMSL HO100 is the newest budget headphone amplifier from SMSL. It can output up to 1.5W into 32ohm and it's priced at $149.
xDuoo TA-26 is a headphone tube amplifier using 6N8P and 6N5P tubes. It is priced at $319.
SMSL HO200 is a midrange headphone amplifier with plenty of power and balanced outputs. Its price starts at $399.
XI Audio Broadway S is a really interesting transportable headphone amplifier that is battery powered and it runs a pure analog discrete class A. It is priced at $1599.
LittleDot MK III SE is a fully balanced hybrid headphone amplifier by this legendary Chinese manufacturer. It pushes up to 2.5W per channel and it's priced at $499.