VCalendar (Virtual Calendar) is an open source Web calendar application with related tools, for posting and maintaining events and schedules online, in calendar format. Unlike any other online calendars, VCalendar comes with source code in PHP, ASP and ASP.NET (C# and VB.NET); with potential for adding more technologies in the future. Key Features: - Localization features, with initial Internationalization in English and Russian, with language selectable by end-users - Dynamic CCS (stylesheet) styles, selectable by end-users - Annual, monthly, weekly and daily calendar views - Multiple categories for classifying calendar events - Recurring and all-day events - Role-based user permissions and calendar configuration