Gateless Gate Sharp is an user-friendly yet extremely powerful open-source multi-algorithm miner for Windows operating systems. It focuses on performance, stability, and ease of use, featuring a one-of-a-kind ability to modify memory timings on the fly and a powerful built-in optimizer. Unlike the original Gateless Gate, this miner aims at stability with a much simpler design and the managed .NET Framework.

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https://github.com/zawawawa/GatelessGateSharp*
https://github.com/zawawawa/GatelessGateSharp/releases/download/v1.3.8-alpha/GatelessGateSharpInstaller.exe (Windows x64 Installer)
Currently, the miner supports Ethash/Pascal dual-mining, Ethash/daggerhashimoto, CryptoNight, CryptoNight-Light, CryptoNight-Heavy, CryptoNightV7, X16R, X16S, Pascal, NeoScrypt, LyraREv2, and the following major pools: NiceHash, ethermine.org, ethpool.org, DwarfPool, Nanopool, Mining Pool Hub, zpool, and mineXMR.com. Support for custom pools has also been added.
All you have to do to mine is to download and run the installer, launch the miner, enter your wallet address(es), and click the Start button. The miner is yet to be fully optimized, however, and the first official release will be available when it is feature-complete.
Please note that, even though this miner does work with NVIDIA cards, the current focus of the project is on AMD.