An open source E-ink smartwatch
Precision Trigonometry: Advanced Calculator for Complex Math
GReortes is a powerfull Greek calendar application (Linux 64bit)
C library for Hebrew dates / times of day / solar times
Pecaldays is a powerfull calendar utility for Linux 64bit OSs.
Fast calendar calculations for 10,000 years (Julian and Gregorian)
Scada for Home Automation
This Day in History
Conscriptus Meet up!
A small calender with TUI for Linux
Take notes, set your to dos,and manage your calendar all on a terminal
A perpetual Jewish Calendar
Shared library/tools for hijri calendar, prayer times, and qibla.