ICS Theme for AnySoftKeyboard

Ice Cream Sandwich Theme for AnySoftKeyboardApache-2.0

Calendar Import-Export

Import, Export & Backup your calendars using ics filesGPL-3.0-only

ICSx⁵

Subscribe to Webcal (.ics) calendarsGPL-3.0-only

KashCal

All your calendars in one app. iCloud, CalDAV, device, ICS. Private.Apache-2.0

Working Time Account

Record working hours, generate and send reports (PDF, CSV and ICS)GPL-3.0-or-later

Etar - OpenSource Calendar

Etar is a material designed open source calendar, for everyone!GPL-3.0-only

CalEF (Calendar Entry Formatter)

Create and send Appointment-Confirmation-Message from Android-Calendar-Entry.GPL-3.0-or-later

DanXi

Maybe the best all-rounded service app for Fudan University students.GPL-3.0-only

TaskDav

Tasks, notes and calendar over CalDAV — or local-only on your phone.GPL-3.0-only

Hypezig

Offline-compatible browser for cultural events in LeipzigGPL-3.0-or-later

Agenda Tech

Private offline calendar: encrypted, zero network, encrypted backups.Apache-2.0

Identiconizer!

Identicons for your contactsApache-2.0

PlaneTxt

Todo, agenda, journal and notes in plain Markdown filesMIT

Kairos

Your tasks in the right order, fitted into your day. No account, no network.MIT

Pappus Travel Planner

From the plan to the settle-up — everything your trips involveGPL-3.0-or-later

Bugaoshan

A campus assistant app for Sichuan University studentsAGPL-3.0-only

DSub

Play music across the networkGPL-3.0-only

jtx Board journals|notes|tasks

Keep track of journals, notes & tasks - iCalendar compliant and syncable with yoGPL-3.0-only

Suntimes Calendars

A calendar provider add-on for Suntimes.GPL-3.0-or-later