ReminderFox Alternatives

Rainlendar - Customizable desktop calendar

Fantastical, the Mac calendar app you'll enjoy using. Quickly create new events with natural language input and more.

Optimize your schedule with custom booking pages and calendar integrations

Try for free freemium $29.0 / One-off ($29 one-time paymnet)

Date Reminder reminds you of recurring or nonrecurring events, like birthdays, bills to pay...

Reminder manager that reminds you about important events in advance.

A simple reminder app made for elementaryOS with Vala and GTK. - matfantinel/reminduck

Kana Reminder is a program which can be used to set a reminder to be triggered at a specified time.

Calendar Lock PEA is an encrypted desktop calendar with a day, week and month view. The shown calendars are never stored unencrypted on your disk, but exist only in the RAM. Platform-independent, Open Source, no installation or registration required.

Open Source

Easy and safe way to manage your crontab file

GMinder is an open source Windows System Tray app that pops up to remind you about Google Calendar events.

Desktop-Reminder is a freeware task planner for Windows to manage your tasks and other to-dos’ in really easy way.

Take control of your schedule and get reminded wherever and however you want.

Organize, track, manage any information related to your home, business or organization.

This program helps you organizing your dates and tasks and reminds you of upcoming events.