I don't know if you are looking for a digital list, or a printed list. There are several 'Reader Lexicons' available for the NT Greek:
Sakai Kubo: A Reader's Greek-English Lexicon of the New Testament (1975) http://www.amazon.com/Readers-Greek-English-Testament-Zondervan-Reference/dp/0310269202/ref=sr_1_1?s=books&ie=UTF8&qid=1370840447&sr=1-1&keywords=sakae+kubo
Burer/Miller: A New Reader's Lexicon of the Greek New Testament http://www.amazon.com/New-Readers-Lexicon-Greek-Testament/dp/0825420091
Those books are great. I grew up on Sakae Kubo. But these books are not digital.
If you have coding skills, you can download the Tischendorf GNT (Several years ago the Morph GNT was available. It was based on the German Bible Society's (USB4/Nestle-Aland text) and came into copyright issues. The SBL GNT came out several years ago and made those copyright issues a non-issue for savvy internet authors who wanted to provide a version of the GNT on their websites. You can go to http://morphgnt.org/
to download their textfiles. I have a database I use at http://www.letsreadgreek.org/resources/ntdatabase3.mdb
that has the old GNT and Tischendord texts in a table. You can make a vocab list from them if you know Excel or Access or are able to link to the NT tables in those databases, you can create word lists from them.
The Perseus implementation has the ability to create word lists. You can find the John page at http://www.perseus.tufts.edu/hopper/text?doc=Perseus%3atext%3a1999.01.0155%3abook%3dJohn
. But that page does not seem to work correctly for the vocabulary utility.
If you look at flashcardexchange.com you can find flashcards for many NT Greek workbooks and texts.
Hope this helps. Why don't you make a re-post or reply about what you are really looking for.