#calendar

Kagelin

An offline-first productivity app combining tasks, a focus timer, habits, and a calendar in one distraction-free space. Free and open source, with an optional paid cloud sync tier.

TurboHog

TurboHog is an AI day-scheduling tool that automatically slots your tasks into your calendar, though its public website currently shares very little detail beyond that core idea.

Synced

Synced shows a real-time heatmap of when everyone across your team — and even other companies — is actually free, pulling from Google Calendar, Outlook, and Microsoft 365, before you try to schedule anything.

Espa AI

An AI executive assistant you text, email, or send a voice memo to for scheduling, inbox triage, and task follow-through, built by the founder of Forethought.

Kokemo

A free scheduling poll: propose a few dates or times, share one link, and let everyone vote Yes/Maybe/No — no accounts, no back-and-forth emails, just a shared answer to "when works for you?"

Vela

An AI assistant that handles the back-and-forth of scheduling a meeting for you — messaging people across email, text, WhatsApp, Slack or Teams to find a time that works, across time zones, instead of you doing it manually.

Hardbook

A booking link for freelancers that doesn't just reserve a date — it automatically fills out a contract with the booking details and gets it signed, so the job is legally locked in the moment the client picks a slot, not days later after paperwork catches

Boxvy

A free app that turns your empty desktop into a workspace of widgets — a mini browser window, calendar, notes and shortcuts always one click away, instead of buried in folders.

Obviouslead

A way to replace a cold email or a boring form with a short video of yourself, for job applications, sales pitches, or freelance proposals — and it tells you afterward exactly who watched, how much of it, and whether they came back for a second look.

CalendarJet

A booking-page tool like Calendly, but bought once for $27 instead of paid monthly forever — including features like your own custom domain that competitors usually lock behind expensive plans.

Timely

Hit a keyboard shortcut and Timely pastes your actual free times into whatever message you're typing — no more opening your calendar, checking timezones by hand, and typing out "I'm free Tuesday 2-4pm EST" manually.

Routine

Instead of switching between a to-do app, a calendar and a notes app, Routine puts all three in one place and lets you talk to it — "remind me to call the plumber tomorrow" becomes a task without typing.

Non-Working Days

Non-Working Days

Namedays Calendar

Namedays Calendar

Nager.Date

Nager.Date

LectServe

LectServe

Holidays

Holidays

Hebrew Calendar

Hebrew Calendar

Festivo Public Holidays

Festivo Public Holidays

Church Calendar

Church Calendar