Michel Pollet has released MII, an open-source Apple IIe emulator written in C for Linux. Designed to be modern, clean, modular, small, and fast, Mii emulates an 65C02 Apple IIe with 128K of RAM and all its graphic modes. It also supports audio, mouse input, and disk images; it can simulate a Titan accelerator; and it includes its own command line shell, debugger shell, and mini-assembler. Future versions could add support for additional RAM, joysticks, and more.
The are no prebuilt binaries or distros for MII; the source code can be downloaded from GitHub and compiled from the command line.
Hat tip to Michael Mulhern!