Time

Cofi - Brew Timer
Open source coffee brew timer

Open TimeLimit
Simply limit the usage duration

TimeLimit.io
Flexibly limit the usage duration

plees-tracker
Plees Tracker is a simple sleep tracker for your Android phone.

Foreground
Task manager app, supporting syncing with Taskwarrior.

GPN 2022
GPN 2022 Schedule

DeuFeiTage
Find the German public holidays per state and year

Suntimes
Sunlight and moonlight times (and alarms)

Persian Calendar
Android Persian Calendar

Calendar Import-Export
Import, Export & Backup your calendars using ics files

ShiftCal
Shift Calendar

Super Productivity
Free to do list & time tracker for programmers & designers

Time Cop
A time tracking app that respects your privacy without being fancy.

Track Work Time
Track your work time

Grazer Linuxtage Schedule
Browse the "Grazer Linuxtage" schedule

Vacation Days
See when you’re free — Vacation Days helps you keep track of your days off.

Birday - Birthday Manager
A simple yet useful birthday manager. Birday is free and ad-free! 🥳

Did I Take My Meds?
An app to manage and track medication doses

PolyCal
colorful, text-based calendar widget

rC3 Schedule
Conference program app for the Remote Chaos Experience (rC3)

DiVOC Schedule
DiVOC Schedule

36C3 Schedule
Conference program app for the Chaos Communication Congress

Etar - OpenSource Calendar
Etar is a material designed open source calendar, for everyone!

BetterCounter
A simple, multi-purpose counter app

Life Dots - Record and analyze
Record and analyze your life in 7 dimensions

Todo Agenda
Home screen widgets displaying events from selected calendars and task lists

Stocks Widget
Stock market ticker widget

ICSx⁵
Subscribe to Webcal (.ics) calendars

Meditation
An essential meditation timer

CalEF (Calendar Entry Formatter)
Create and send Appointment-Confirmation-Message from Android-Calendar-Entry.