1.ical-org / ical.netiCal.NET - iCalendar library for .NetC#Other license983 total255 forks+33 starsfrom 950 · score 3.53
2.EGroupware / egroupwareWeb based groupware server written in PHP, forum at https://help.egroupware.org/egroupwarewebmailproject-managementaddress-bookcalendarcaldav-server+4 morePHPOther license302 total115 forks+13 starsfrom 289 · score 2.64
3.Pikaday / PikadayArchivedA refreshing JavaScript Datepicker — lightweight, no dependencies, modular CSSJavaScriptOther license8.1K total1.3K forks+4 starsfrom 8,066 · score 1.61
4.roomorama / CaldroidA better calendar for AndroidJavaOther license1.4K total513 forks+2 starsfrom 1,391 · score 1.10