The ORIGINAL and FIRST Desktop VU-Meter for Rainmeter by HiTBiT-PA.

www.deviantart.com/hitbit-pa/art/Desktop-VU-Meter-LITE-edition
The ORIGINAL and FIRST Desktop VU-Meter for Rainmeter by HiTBiT-PA.

www.deviantart.com/hitbit-pa/art/Desktop-VU-Meter-LITE-edition
The Audio Spatialisation for Headphones Toolset is a set of tools for headphone correction and binaural synthesis of spatial audio systems on headphones.

github.com/ShanonPearce/ASH-Toolset
sourceforge.net/projects/ash-toolset
Boogex is a free guitar amplifier AudioUnit, AAX, and VST plugin with a variety of sound shaping features, for professional sound and music production applications. With Boogex it is possible to get a heavy distorted sound as well as slight “jazzy” saturation sound. Boogex is able to apply convolution with any speaker cabinet impulse response (selection of built-in impulses is available). The processing latency is close to zero making it possible to use Boogex for real-time guitar processing.
Boogex can be used as a plain stereo convolution processor when its “Amp” stage is turned off. The convolver module has zero latency and is not CPU-demanding. Boogex also includes the input gate module, and reverberation module derived from Voxengo OldSkoolVerb reverb plugin.
Boogex produces a nice “minimalist” rock music-geared sound which may be a bit noisy at higher overdrive settings; higher frequencies can be easily suppressed with its built-in Emphasis EQ. With the amp modes Boogex currently provides, it is not particularly well-suited for metal music, but can still be used as a cabinet impulse response processor for metal music.

Museeks aims to be a simple and easy-to-use music player with a clean UI. You will not find tons of features, as its goal is not to compete with more complete and more famous music players.
.m3u import/export
museeks.io
github.com/martpie/museeks
sourceforge.net/projects/museeks.mirror
Anklang is a digital audio synthesis application for live creation and composition of music and other audio material.

anklang.testbit.eu
tim-janik.github.io/anklang
github.com/tim-janik/anklang
Symphonie is a sleek, lightweight desktop music player built with Electron and powered by HTML5 capabilities, offering a clean interface for enjoying your local audio library. It supports popular formats including MP3, FLAC, AAC, M4A, OGG, WAV, OPUS. Features include playlist management, intuitive playback controls, track metadata display (title/artist), and shuffle functionality for a seamless listening experience.

An OBS plugin that allows capture of independent application audio streams on Windows, in a similar fashion to OBS’s game capture and Discord’s application streaming.
obsproject.com/forum/resources/win-capture-audio.1338
github.com/bozbez/win-capture-audio
gigazine.net/gsc_news/en/20211230-obs-win-capture-audio
OpenPiano is a Windows desktop piano application that allows you to play, practice, and record music using your PC keyboard, mouse, or a MIDI device.
It supports real-time playback using SoundFonts and provides on-screen piano layouts for visual feedback while playing.
OpenPiano is designed to run entirely locally. It does not require accounts, cloud services, or an internet connection for core functionality.
- 61-key and 88-key layouts with live key feedback
- SoundFont support (.sf2 / .sf3) with bank and preset selection
- Keyboard, mouse, and MIDI input support
- Editable keybind mode with Save, Discard, and Ctrl+Z undo
- Keyboard and mouse combo triggers with shared 61/88-key mapping
- MIDI recording and .mid export
- Real-time controls for volume, velocity, sustain, and transpose
- Live stats for KPS, held keys, and polyphony
- Theme, UI scale, animation speed, and key color customization
- Built-in tutorial with an in-depth explanation of features
- Offline local-first workflow with no account required

www.justagwas.com/projects/openpiano
github.com/Justagwas/openpiano
sourceforge.net/projects/openpiano
Overtone GEQ is a free 7-band harmonic (overtone) graphic equalizer AudioUnit, AAX, and VST plugin with multi-channel operation support (supporting up to 8 input/output channels, audio host application-dependent). Overtone GEQ offers extensive internal channel routing capabilities, and supports mid/side channel processing.
Beside equalizing, Overtone GEQ applies harmonic enhancement: it uses 7 harmonic enhancement modules, one for each EQ band. This generates a complex harmonic coloration you will probably like a lot.
Overtone GEQ was designed to allow audio engineers to apply quick EQ shape adjustments together with adding a bit of harmonic richness to the audio material (mainly mixes and sub-mixes due to a comparably high load this EQ puts on a CPU).

This program now comes in two flavours, as a Direct Show filter and a VST plugin. The Direct Show Filter allows any Direct Show capable audio player software (such as Windows Media Player) the ability to read and decode B-format wave files (the format of which is specified here on Richard Dobson’s web page – details on the Waveformat extensible file format used can be found on Microsofts web site here – details on Ambisonics can be found here).
The VST version comes in 1st and 2nd order versions (3rd and 4th order versions to follow) and allows you to alter the polar patterns of the speaker feeds either across the whole frequency range or using ‘Shelf Filters’ with a variable cut-off. Both of the VST plugins will derive outputs for a standard ITU 5 speaker array, with higher orders giving better frontal resolution.
web.archive.org/web/20070806013036/http://sparg.derby.ac.uk/SPARG/Staff_BW