I thought I would share some reseach I have gathered for a project I am involved in. Here is a what I hope will be a comprehensive list of Javascript date pickers (and soon full calendars) that I have uncovered.

I added some preliminary ratings to them as well if you are in a hurry (stick to the ROBUST offers).

Javascript Date Pickers

fee based:

http://www.codethat.com/javascript-calendar.html
ROBUST

http://www.zapatec.com/website/main/products/prod1/
ROBUST - uses free DynArch techology (see below)

http://www.calendarxp.net/tt_flat.shtml
ROBUST

http://www.softcomplex.com/products/tigra_calendar_pro/
ROBUST

http://www.kerberosdev.net/developer%2Dresources/02%2Dpopup%2Ddate%2Dpicker/
ROBUST

http://www.obout.com/calendar/
ROBUST

http://www.basicdatepicker.com/samples/
ROBUST

http://www.peterblum.com/datecontrols/DateTextBoxMain.aspx#Demo
ROBUST

http://www.primorissoftware.com/
AVERAGE

http://software.future-shock.net/html/date-picker.asp
AVERAGE

http://www.sparrowscripts.com/dp-intro.php
AVERAGE

http://webfx.eae.net/dhtml/datepicker/datepicker.html
AVERAGE - wheel support

http://www.blueshoes.org/en/javascript/datepicker/
BASIC

http://hotelsys.biz/html/caltest_incr_www.html
BASIC

http://www.phpguru.org/static/dyncalendar.html
BASIC

http://navsurf.com/dhtml/acecalendar/
ENTRY

http://www.nsftools.com/tips/DatePickerTest.htm
ENTRY

http://ricom.co.uk/resources/date-picker/date-picker.php?id=4
ENTRY

http://www.asptools.biz/DP/
ENTRY

http://www.visualasp.com/monthview.asp
ENTRY

free:

http://www.dynarch.com/projects/calendar/
ROBUST

http://www.domapi.com/build/tests/HTML_4.01_Transitional/calendar.htm?theme=system&skin=false&lang=eng
AVERAGE

http://dali.mty.itesm.mx/~hugo/js/datepickercontrol/
AVERAGE

http://com2.devnet.scd.yahoo.com/yui/calendar/index.html
AVERAGE

http://www.webreference.com/dhtml/column71/
BASIC

http://www.mattkruse.com/javascript/calendarpopup/
BASIC

http://www.javascriptkit.com/script/script2/tengcalendar.shtml
ENTRY

http://rightangle.co.in/utilities/calendar.htm
ENTRY

New & Unrated

http://www.mojavelinux.com/projects/popupcalendar/

suites that include a calendar widget:

http://www.zapatec.com/website/main/products/suite/
ROBUST

http://www.telerik.com/r.a.d.controls/Calendar/Examples/Design/Sunny/DefaultCS.aspx
ROBUST

http://www.componentart.com/Calendar/default.aspx
ROBUST

http://www.richercomponents.com/asp-net-components/rich-date-picker.html
ROBUST

http://www.activeup.com/products/components/activecalendar/
ROBUST

http://www.peterblum.com/datecontrols/home.aspx
ROBUST

http://www.infragistics.com/products/NetAdvantage/WebForms/Schedule.aspx
AVERAGE

http://www.karamasoft.com/UltimateCalendar/Samples.aspx
AVERAGE

http://www.interaktonline.com/demos/MXWidgets/allwidgets/mxw3_date_picker_textfield.php
AVERAGE - this is DynArch product but less feature rich

http://www.dbi-tech.com./ctDropDate.asp
BASIC

http://www.syncfusion.com/Products/features.aspx?t=314
BASIC

http://www.stedy.com/
ENTRY

Here are more date pickers that I found to compare web widgets to what desktop users have to pick from:

UI components for desktop apps:

windows:

http://www.xceedsoft.com/products/UIStudio/index.aspx
BASIC

http://www.codejock.com/products/calendar/
BASIC

java:

http://www.java-calendar.com/screenshots.php
ROBUST

http://www.javadatepicker.com/index.html
AVERAGE

Here are some more alternatives:

flash:

http://www.flashloaded.com/flashcomponents/xmlcalendar/
AVERAGE

tutorials (build your own):

http://www.dmxzone.com/ShowDetail.asp?NewsId=6151

http://developer.yahoo.net/yui/calendar/index.html