List of good MacOS FOSS applications and utilities that I have come across

• Media
  • Audio
• Personal
• Utility
  • Files
  • Data Recovery
• Security
• Terminal
• Vim
  • Auto-Complete
  • Formatting
  • Syntax Highlighting
  • Themes
  • Utility

• IINA - Modern media player for MacOS
• VLC - VLC is a free and open source cross-platform multimedia player and framework that plays most multimedia files as well as DVDs, Audio CDs, VCDs, and various streaming protocols

• Audacity - Multi-track audio editor and recorder
• Plug - Hypemachine client for MacOS
• SpotMenu - Spotify and iTunes in your MacOS menu bar

• Gimp - Free photo editing like photoshop
• LibreOffice - Free office suite
• ToDoist - To do list

• App Cleaner - AppCleaner is a small application which allows you to thoroughly uninstall unwanted apps
• Rectangle - Move and resize windows in macOS using keyboard shortcuts or snap areas
• Transmission - Lightweight robust BitTorrent client

• Encrypto - Easy file encryption before distributing to others
• Keka - File archiver
• TheUnarchiver - File archiver extration

• TestDisk - Primarily designed to help recover lost partitions and/or make non-booting disks bootable again

• LuLu - Free firewall
• Do Not Distrub - Physicall access detection
• KnockKnock - Persistently installed software detection
• TaskExplorer - Task Explorer
• OverSight - Mic and Camera access monitor
• KextViewer - Kernel module viewer

• iTerm2 - Terminal
• Oh-My-Zsh - Zsh configuration manager

• Vim Plug - Minimalist Vim plugin manager

• coc - Intellisense engine for Vim8 & Neovim, full language server protocol support as VSCode
• onmisharp-vim - Vim omnicompletion (intellisense) and more for C#
• VimCompletesMe - A super simple, super minimal, super light-weight tab completion plugin for Vim.

• indentLine - Displays thin vertical lines at each indentation level for code indented with spaces.
• tabular - Text alignment
• vim-markdown-toc - A vim 7.4+ plugin to generate table of contents for Markdown files.

• ale - Check syntax in Vim asynchronously and fix files, with Language Server Protocol (LSP) support

• ansible-vim - Ansible syntax highlighting

• nginx - Nginx syntax highlighting

• python-syntax - Python syntax highlighting

• Rainbow - Rainbow Parentheses Improved, shorter code, no level limit, smooth and fast, powerful configuration.

• vim-markdown - Markdown syntax highlighting

• vim-ps1 - Powershell syntax highlighting

• vim-sql-syntax - SQL syntax highlighting

• gruvbox - Retro groove color scheme for Vim

• nerdtree - A tree explorer plugin for vim.

• vim-illuminate - Automatically highlighting other uses of the word under the cursor

• vim-nundo - Vim undo tree visualizer

• vim-markdown-preview - A light Vim plugin for previewing markdown files in a browser - without leaving Vim.

• vim-table-mode - VIM Table Mode for instant table creation.