Sure just google "koine greek" and loads of stuff comes up, a lot of it is free. But please, please learn the greek alphabet. Whenever I hear people who do a “word study” I just think of all of the nuance which they are missing. And it has the feel of their cutting and pasting something out of their favorite commentary.
This site is my favorite website for readable greek text without having to install greek fonts.

http://www-users.cs.york.ac.uk/%7Efisher/gnt/

The other goodies should show up in the “koine greek” search. If you are interested there are also reproductions of ancient manuscripts at

http://csntm.org/Manuscript/

My favorite is

http://csntm.org/Manuscript/View/GA_032

the covers have the four evangelists painted on them, though John has been rubbed off through extreme age and handling.

May God aid you in your search

Nathan

Thanks Nathan. I will definitely look into the links.

Well, I was schooled in Attic Greek, so I don't know if I can submit many NT resources. Here are some online and offline ones I recomend:

Smyth Greek Grammar: THE authority on Greek Grammar:
[online] http://www.ccel.org/s/smyth/grammar/html/toc.htm
[pdf] http://www.textkit.com/learn/ID/142/author_id/63/

The Greek and Hebrew Reader's Bible:
[online] http://bible.johndyer.name/

Greek Study Bible: Read, Word Study, Translate
http://www.greekbiblestudy.org/gnt/main.do

Inst. of Bib Greek
Online Classes (maybe paid, though) lots of links and helps)
http://www.biblicalgreek.org/classes/web/

Greek NT Gateway:
http://www.ntgateway.com/greek-ntgateway/learning-new-testament-greek/

Bunch o' Resources
http://www.textkit.com/greek_grammar.php