"600,000+ VERSES SERVED." Zack Hubert continues to develop his wonderful www.zhubert.com website for biblical language resources. Here is his current list of resources available:

Texts Currently Available - jtauber's GNT v. 5.05, CATSS' LXX, Tanakh, Apocrypha
Concordance - a navigable list of all lemma linked to all usages
Parallel Passages - as many verticals as you'd like
Parsing - available for every Greek word, just hover over the word with your mouse
Word Detail Page - click on a word while reading and see detailed information about that word
Word Study - from the detail page, you can conduct a study on every use of the form or the root
Graphical Occurrence - from the word detail page, shows occurrences of both root and form by book
Basic Root Definitions - simple lexicon entries that you can make more accurate (moderated)
User Features - keep your own bookmark, translation, and font settings (if you're logged in)
Interlinear - include NASB, ESV, KJV or your own translation right next to the Greek

I've only tried out a few of these, but what I have used is very well done.