Favorite links
Biblical studies
Early Christian Writings terrific collection of texts, translations, and information on Christian writings from the first two centuries
gospels.net blog of Andrew Bernhard — hasn’t been active in a while, but lots of interesting posts and links
New Testament Research research on the New Testament by James M. Gibbs, PhD.
Languages
Ancient Scripts information about writing systems from prehistory to today
Zhongwen excellent online Chinese dictionary
Math, science & tech
Lessons in Electric Circuits by Tony R. Kuphaldt free online textbook in six volumes on electric circuits, readable and useful — good study worksheets by the same author are here
Lessons in Industrial Instrumentation by Tony R. Kuphaldt free online textbook on physics, chemistry, and electricity — good worksheets for studying are here, too
Vector addition nice online calculator (and good tutorial on vector operations) at the HyperPhysics website at Georgia State University
W3Schools excellent and free online tutorials on HTML, CSS, XML, and lots of other web-building stuff; great for learning and for quick reference
—reference list of HTML/XHTML symbol entities
—reference list of HTML/XHTML tags
Music
Petrucci Music Library wonderful collection of public domain music scores in PDF format; I’ve found a number of old piano-vocal scores for operas there
Puzzles & games
George versus the Listener Crossword one man’s blog about the Listener puzzle
Listen with Others many-authored blog about the Listener puzzle
