Free, open source and funded by donations, Thunderbird is the email client for people who want mail, calendar and contacts kept on their own machine.
Webmail tabs and the built-in Mail app fall short once you're juggling several accounts. Mailspring answers with a native client and unlimited free accounts.
7-Zip is a free, open-source file archiver that opens almost everything and compresses tighter than most paid rivals. A plain interface is the only real cost.
Sumatra PDF is a free, no-frills PDF reader that opens files on Windows almost instantly, without Adobe's bloat. See who it actually fits.
Mozilla Firefox is a free, open-source web browser that runs on its own independent engine, built around strong privacy defaults and deep customization.
One long read on the week's biggest shift, every Sunday.
