Please ask the authors of the respective application for an officially-supported, upstream-provided AppImage.
A simple gui frontend for mp3gain, vorbisgain and aacgain, which allows modifying the loudness of mp3, ogg vorbis and mp4 audio files.
The gEDA project has produced and continues working on a full GPL'd suite and toolkit of Electronic Design Automation tools. These tools are used for electrical circuit design, schematic capture, simulation, prototyping, and production. Currently, the gEDA project offers a mature suite of free software applications for electronics design, including schematic capture, attribute management, bill of materials (BOM) generation, netlisting into over 20 netlist formats, analog and digital simulation, and printed circuit board (PCB) layout.