TotalFinder - TotalFinder is a plugin for Finder.app which adds tabs like in Chrome browser, dual panels similar to TotalCommander and more tweaks.
NeverBounce - Real-time email verification and cleaning to ensure emails never bounce.
Path Finder - The Finder, reinvented. Path Finder is an award-winning file browser and management application for Mac OS X.
Email List Verify - The Fastest Way to Improve Email List Deliverability and ROI
Forklift - The most advanced dual pane file manager and file transfer client for macOS.
ZeroBounce - Removes invalid emails from your list to prevent email bounces from ruining your deliverability.