Below you will find some useful links to various topics:
• Cross Stitch Calculator (from YarnTree.com)
• Weeks Dye Works Threads to Nearest DMC Equivalent
• Classic Colorworks (Crescent Colours) to DMC
• Which Needle? (from John James Site)
• DMC Tapestry Wool Colour Chart with substitutes & hints
• DMC Color Card for cotton threads inc Stranded
• Working with Metallic Threads
• Sajou Retors du Nord/DMC conversion chart PDF file download link