• Dictionary & search
   M-W, AlltheWeb, Google, Webopedia
   >>>>>>>>>>>>>>>>>>>>>>>>>

• Networks & subnets
   Subnet mask calculators & table

• Special character codes
   Selected ISO 8859-1 codes

• Web colours
   Are you limited to 216?

Merriam-Webster; very decent dictionary and thesaurus:

AlltheWeb is in all likelihood the best search engine around:

Closely followed by Google... It´s well worth using both.

Webopedia; fine online dictionary for words, phrases and abbreviations related to computer and internet technology.

Enter a keyword... Enter a search term and press Go!