A portable (SDL) audio synthesizer / tone generator inspired by the Korg ER-1

An audio player that just plays audio files. It doesn’t require an organized music library and won’t overload you with tons of functionality.
Audio Player still offers advanced features such as:
- An elegant waveform of the track
- Adjustable playback speed
- Easy seek controls
- Playing multiple files at the same time

apps.gnome.org/Decibels
gitlab.gnome.org/GNOME/decibels
flathub.org/en/apps/org.gnome.Decibels
X-Mouse Button Control (XMBC) is a free tool for Windows that allows you to re-configure and remap mouse buttons to expand the capabilities of your mouse.
Media control (Play/Pause/Stop/Volume/Mute etc.)
MP3Gain Express is a port of MP3Gain and AACGain to macOS and OSX. It allows you to analyze or apply volume gain to a list of MP3 or AAC files. Anyone who has used the Windows UI for MP3Gain should find this one familiar, as it was designed to look similar to that version.

projects.sappharad.com/mp3gain
OSX Version
Convert words and sentences to 5 note chords you can use to inspire music creation. Have fun turning your name, your city name, your friends’ names, your team’s name, your pet’s name into wild and original harmonies that go beyond serialism and classic jazz.

The Fraunhofer MPEG-H decoder (mpeghdec) is a C/C++ implementation of the MPEG-H Audio standard as defined in ISO/IEC 23008-3:2022. MPEG-H Audio is the Next Generation Audio (NGA) codec for personalized and immersive sound. Please visit www.mpegh.com to learn more about MPEG-H Audio.
github.com/Fraunhofer-IIS/mpeghdec
en.wikipedia.org/wiki/MPEG-H
en.wikipedia.org/wiki/MPEG-H_3D_Audio
Recorder is a simple, cross-platform audio recording application.
gPodder is a simple, open source podcast client.
In development since 2005 with a proven, mature codebase.

gpodder.github.io
github.com/gpodder/gpodder
www.wikidata.org/wiki/Q3093354
gpodder.net is a libre web service that allows you to manage your podcast subscriptions and discover new content. If you use multiple devices, you can synchronize subscriptions and your listening progress.
It works best with the gPodder application, but you can also use it with Amarok, other supported clients or as standalone web application without any client app.
Kasts is a convergent Kirigami-based podcast application that looks good on both desktop and mobile.
Its main features are:

apps.kde.org/kasts
invent.kde.org/multimedia/kasts
github.com/KDE/kasts
Tiny Qt Music Player to keep your favorite songs at hand.
apps.kde.org/vvave
github.com/KDE/vvave
flathub.org/en/apps/org.kde.vvave