macOS
Important Guides
osx-and-ios-security-awesome - macOS and iOS Security Related Tools
The above guides are good read and should be followed for a better hardening of macOS, however the OS is too stiff and proprietary so there's no way to disable "calling home" (Connecting with Apple servers) without breaking the device, to my knowledge.
Browsers
Brave Been in some contraversies in the past , but generally decent ig.
Firefox , Generally in terms of security chromium browsers are recommended, but if you want to use firefox, use it with hardened user.js Arkenfox (can break some sites) or use Hardened user.js Betterfox (better compatibility)
Search Engine
Mullvad Leta (Has brave search and google search and uses cached pages to show result, essentially privacy friendly), currently the best option IMO. Currently there is no tab to look for images, shopping, map etc.
Brave Search (the most closest result to google, at-least for me)
If you use Brave Browser, Brave Search is the default.
SearXNG (the link provides various instances which you can configure, but if you wish to get one that just works then you can find it here SearXNG )
StartPage Currently owned by an advertising company, I think the ad company is based in China
Its's basically Bing but more privacy focused. It's the most recommended but people have hard time adapting to it. Have been in some controversies lately
mojeek ,has its own crawler and index, that is it is not dependent on google or bing results. The results however is pretty bad imo. It could be improved in the future if enough feedback is given ig?
Browser Extensions
uBlock Origin - Ad content blocker (For chromium based browsers = uBlock Origin Lite)
Bypass All Shortlinks Debloated (Requires either ViolentMonkey, Tampermonkey, or FireMonkey) (Greasy Fork, OpenUserJS or Userscripts Find new scripts from these sites)
Firefox Multi-Account Containers - Color-coded tabs in this tool keep your online life separated, preserving your privacy. Cookies are containerized, allowing simultaneous use of multiple identities or accounts.
FOSS App Indexes
Password Privacy / 2FA
Ente Auth - 2FA, All Platforms
Aegis - 2FA
Stratum - 2FA
KeePass or KeePassXC - Password Manager
Bitwarden - Password Manager
Proton Pass - Password Manager
Strongbox - Password Manager
DNS Adblocking
VPN
Mullvad VPN - Paid
IVPN - Paid
NYM - Paid
Antivirus
Safari Adblockers
Privacy / Security Tools
Lockdown Privacy - Block Trackers \& Ads
LuLu - Mac Firewall
SuspiciousPackage - Analyze PKG Files
LinkLiar - Spoof MAC Address
Kextviewr - View All Kernel Modules
What Route - Network Diagnostic Tool
Sloth - Process Manager
Hardware / System Monitors
Conky - Hardware / System Monitors
Colors - Hardware / System Monitors
eul - Hardware / System Monitors
Stats - Hardware / System Monitors
Mission Center - Hardware / System Monitors
MacFetch - Hardware / System Monitors
Hot - CPU Monitor
TaskExplorer - Task Manager / Viewer
Pearcleaner - System Cleanup; Uninstallers. Github
File Tools
PeaZip, The Unarchiver, unxip, Keka - File Archivers
Readdle - Multipurpose File Tool
OpenMTP - Mac / Android File Transfer Github
JDownloader - File Download Manager
Go Speed - File Download Manager; Extension; Plugins
FlyingCarpet - Cross-Platform AirDrop; Guide