Trilium Notes - Trilium Notes is a hierarchical note taking application.
VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
Learn Swift - Screencasts & code examples to learn Apple’s new Swift
AIMP - AIMP : Free Audio Player : Официальный сайт программы
Google Keep - Capture notes, share them with others, and access them from your computer, phone or tablet. Free with a Google account.
foobar2000 - An advanced freeware audio player for the Windows platform.