Nero Manager

A fast and efficient Proton prefix runner and manager, using umu as its backend for Steam-like compatibility with non-Steam applications.

Highlights:

• It's fast: Built with C++ and Qt, Nero Manager can load large lists of shortcuts (including icons) in less than half a second, while the native toolkit uses half the memory of other managers based on web browser engines.
• It's simple by default: Create a prefix, add a shortcut, and done. Popups and settings are kept to a minimum to make adding new items as quick as possible.
• It's flexible when needed: With comprehensive settings for both prefix and shortcut, even things that experts will use often like DLL overrides or configuring add-ons to run alongside umu like Gamemode and Gamescope can be configured graphically; all without having to type in long-winded command strings.
• It's streamlined: Comprehensive descriptions of each setting and how to get the best out of them will make even a new user armed and ready with the knowledge to make full use of Proton's potential.
• It's integrated:* A built-in Winetricks frontend skips (most of) the clunkiness, allowing quick and simple verbs installation either during or after creating a prefix, and per-shortcut version overrides can be set without using Winecfg.
• It works from the CLI: Nero Manager is the integrated graphical frontend, made for creating, managing and running prefixes and shortcuts. But when run from the CLI, Nero's Runner component can launch an executable in a prefix, not unlike Bottles.
• It's got other stuff: Easily install the Discord RPC bridge for each prefix, automagically apply SDL Controller layouts fix (e.g. for Nintendo controllers et al), set custom shortcut icons, use pre-run and post-run scripts, and just play your darn games already.