Perkoon vs TrackMailBox

File transfer was a solved problem. Then everyone decided to make it worse — size caps, forced signups, expiring links, surprise paywalls. The usual.
Perkoon unsolved it.
Free P2P transfers beam files directly between browsers. No server in the middle. No size limit. No account. Both parties online, files move. Simple physics.
Cloud storage exists for when the other human is offline, encrypted and waiting for them whenever they show up. This one costs money. Servers aren't powered by good vibes.
Here's where it gets interesting: Perkoon is the first file transfer service built with native agent accessibility. Machine-readable state, stable DOM selectors, automation API. Your AI workflows can send and receive files without pretending to be a human clicking buttons. The future showed up early.
CLI included: npx perkoon send/receive. Works browser-to-CLI, CLI-to-CLI. Because terminals deserve nice things too.

TrackMailBox is a free and unlimited email tracking extension designed specifically for Gmail users. It addresses a common question among email senders: "Did they read it?" Unlike Gmail's default settings, which lack built-in read receipts, TrackMailBox provides a seamless solution for those who send important emails like proposals, pitches, or follow-ups. The tool eliminates the frustrations associated with other email tracking solutions that often impose restrictions, include unwanted signatures, or charge monthly fees. With TrackMailBox, you can track an unlimited number of emails without any branding, ensuring that your communications remain professional and clean. This extension is perfect for freelancers, sales teams, recruiters, job seekers, and founders—essentially anyone who relies on email for communication and wants to gain insights into their email engagement.