Reference Guides

WEB Development

CSS: Download css2.pdf from this link: http://www.w3.org/TR/REC-CSS2/

HTML: html40.pdf can be downloaded from this page: http://www.w3.org/TR/1998/REC-html40-19980424/

JavaScript:

Online javascript and the reference guide. More manuals here
Quick Reference Guide from Danny Goodman gives a great overview
More javascript resources here

Domino URLS

Check this Cheat Sheet
Add-on's:

Link to attachment: ../docunid/$file/filename
Link to embedded picture: ../docunid/fieldname/0.84?OpenElement&FieldElemFormat=jpg
Access shared resources with ?OpenFileResource

Windows / MS Office

Office Constant's: When you copy sample code from MSDN (or other) it is filled with constants. You cant use these in Lotus Script directly - but you can find them in this database and include them in your script. Or, just right click on the constant name in the VBA Editor and select 'Quick Info'

MSDN
It can be hard to findd your way around in MSDN. Here are some direct links to sections that I often use:
MSXML All about the DOMDocument, used to load and parse XML files
Excel object model Word 2010 object model

Web Services
http://xmethods.com/