nowfound

Dev tools · February 5, 2019

OI Calendar

Encrypted, decentralized alternative to Google calendar

OI Calendar launched on February 5, 2019 with 78 votes, #518 of 3,290 launches that month and more than 75% of that year's launches. The site was still online in September 2026, 7 years on.

What it does

OI Calendar is an encrypted, decentralized alternative to Google Calendar. It is your open source calendar in the cloud that belongs to you - as in your own Blockstack identity. Your data is only seen by you, your invited guests and in encrypted form your storage provider.

Private, encrypted calendar in the cloud using Blockstack, free and open source.

Does a similar job

all alternatives →
  • I built an open source web calendar inspired by the Google calendar2024 · schedule-x.dev · ▲232

    I love the looks and UX of the Google calendar. But I wanted to have a version I could use more freely in my own projects, still looking similar to the one from Google.

  • hora CalendarJun 2026 · horacal.app · ▲132

    The Mac calendar Google never built. Fast, native, private — designed for people who find Apple Calendar too limited and everything else too much.

  • Google Calendar2015 · gmail.googleblog.com · ▲413

    Spend less time managing your day, now on iOS

  • Secure Calendar2019 · securecalendar.online · ▲75

    Privacy respecting calendar

  • Rolo Calendar2016 · rolotime.com · ▲187

    A calendar for people who don't use calendars

  • Automatic out-of-office calendar2020 · getclockwise.com · ▲94

    Just mark your calendar as OOO, we take care of the rest

More dev tools this month

the category →
  • /dev/null▲484

    a social network for devs

    Dev tools · 3d ago · dev-null.sh

  • open-source IDE for thoughtful software design. Contribute to devdotfast/whiteboard development by creating an account on GitHub.

    Dev tools · 28d ago · github.com

  • Contribute to reladraw/reladraw development by creating an account on GitHub.

    Dev tools · 26d ago · github.com

  • OpenBot▲362

    Grok Bot alternative: free, local, open-source, multiplayer

    Dev tools · 23d ago · openbot.run

  • Talanoa▲346

    Hi HN, I’m a fullstack developer, and honestly, I’ve lost count of how many side projects I’ve worked on over the years. But one idea kept coming back to me: a different kind of email client. It first came to me in 2014: “What if we could handle emails more like conversations?” Every year, I’d revisit this concept in my “Build Notes.” Ten years later, no one had built exactly what I had in mind — so I finally decided to do it myself. That’s how Talanoa was born. I wanted something focused on people, not timelines. I was tired of marking messages as unread just to remember to reply later, or…

    Dev tools · 20d ago · talanoa.email

  • CoreSpeed▲332

    One MCP for everything your agents need: apps, memory, tools

    Dev tools · 28d ago · corespeed.io

Source: Product Hunt launch ↗

Launched alongside, February 2019

the whole month →
  • MY

    Make your site’s pages instant in 1 minute and improve your conversion rate by 1%.

    Life & fun · 2019 · instant.page

  • Flatfile▲1,069

    The data onboarding platform

    AI · 2019 · flatfile.com

  • Mixkit▲984

    High-quality stock videos that are completely free.

    Growth · 2019 · mixkit.co

  • Sheety▲974

    Turn your Google Sheet into an API instantly, for free

    Dev tools · 2019 · sheety.co

  • Computer generated people - refresh to get a new one

    AI · 2019 · thispersondoesnotexist.com

  • Build custom ecommerce stores visually

    Work · 2019