Official site: https://github.com/mbevand/silentarmy

SILENTARMY is a free open source Zcash miner for Linux with multi-GPU and Stratum support. It is written in OpenCL and has been tested on AMD/Nvidia/Intel GPUs, Xeon Phi, and more.

Important changes in v5:

• Major 2x speedup on all GPUs: R9 Nano at 115 sol/s, RX 480 at 75 sol/s, GTX 1070 at 70 sol/s → thank eXtremal
• Major CPU usage reduction: it should now be close to zero (except Nvidia: https://github.com/mbevand/silentarmy/issues/54)
• Major PCIe bandwidth reduction: from 100 MB/s to 500 kB/s per GPU
• Implement stratum.reconnect

Full changelog:
https://github.com/mbevand/silentarmy/blob/master/CHANGELOG.md

Be sure to check the README for installation instructions:
https://github.com/mbevand/silentarmy/blob/master/README.md

SILENTARMY was initially written as a command line solver for the Zcash open
source miner challenge. Its OpenCL kernel is more optimized than any other
public Equihash solver, so as a result it was integrated into multiple other
miners: Zogminer, Genoil's miner, eXtremal's miner, etc. But now I have
developed SILENTARMY into a full miner of its own.

GitHub: https://github.com/mbevand/silentarmy
Zcash forum thread: https://forum.z.cash/t/silentarmy-gcn-1-now-supported-45-7-sol-s-with-one-r9-nano/3580