Small, free and open-source tools for macOS
Every app here started because something on my own Mac was missing, slow or awkward. Once a tool made my daily work easier, I shared it: free, with its source code, under the GNU GPL.
Menu bar CPU, RAM and disk monitor
MacMonitor is a free, open-source macOS menu bar app that shows live CPU and RAM usage, with per-core load, memory breakdown, top processes and free disk space one click away.
A lightweight, free alternative to iStat Menus, Stats and MenuMeters when you only need CPU, memory and disk at a glance.
Menu bar calendar and world clock
MacCalendar is a free, open-source macOS menu bar calendar with a dual world clock and country flags, a month view, quick notes for any day and more than 400 cities.
A free alternative to Itsycal, Dato and Clocker: a month calendar and a second time zone right in the menu bar.
WinRAR-style archive manager
MacRAR is a free, open-source, WinRAR-style archive manager for macOS: open, extract and create RAR, ZIP, 7Z and TAR archives, with a Finder right-click menu.
A free WinRAR alternative for the Mac, and an alternative to Keka, BetterZip and The Unarchiver.
FTP, FTPS and SFTP client
MacZilla is a free, open-source, native FTP, FTPS and SFTP client for macOS in the spirit of FileZilla: two panes, tabs, a transfer queue, folder sync and a Site Manager.
A free, native alternative to FileZilla, Cyberduck and Transmit on the Mac.
The apps are not notarized by Apple (that needs a paid developer account), so macOS blocks them the first time. Allow each app once in System Settings ▸ Privacy & Security ▸ Open Anyway. Every release lists a SHA-256 checksum.