In the past, some of my colleagues have used Intel's 82599 NICs for kernel bypass. Their Linux driver is quite good, they have a DPDK platform for developing user-space apps to directly access ring buffers on the NIC, and if you do a quick search, you should be able to find examples online.

Cloudflare wrote a blog post recently about accelerated packet IO and their post mentions the 82599 NIC: https://blog.cloudflare.com/kernel-bypass/.