The following title is in Italian but is really good (IMHO):
Marinella De Luca: Il verbo greco. 253 verbi: genesi, formazione, coniugazione, lessico comparato e confronti con il latino e le lingue moderne. Publisher : Hoepli
You can buy it on Amazon, for instance. It comes with a CD-Rom where you have PDFs with the verbs conjugated. You can print the tables if you want.
The verbs category will enable you to learn and test yourself on the paradigms. There are also lists of the principal parts of 100 essential verbs which you can learn and self test.
Liberation Philology Ancient Greek – It tests you on vocabulary, recognizing noun, verb, participle and adjective forms. The reference section has the full conjugation of some 60 or 70 verbs.
Hoi Polloi Logoi tests you on verb forms for a relatively small list of verbs. You can control which tenses, moods, and voices to test. In most cases for a verb, you identify: person number, tense, mood, voice, but occasionally you have to type the required form yourself.
The nice thing about the apps is that you work on verbs while you’re waiting in line at the supermarket.
I haven’t tried the hoi polloi logoi app, but I’ve used the Lib.Phil. app quite a bit and I can second Mark’s recommendation. It’s perfectly formatted for either an android or an iPhone and very convenient for drilling forms on the go. There’s a corresponding Latin app., if you wish to drill Latin forms. If you’re looking for a reference tool, Seneca’s recommendation of Marinone looks good to me.
Rufus, I would suggest you try to view a copy of Marinone’s All Greek Verbs before you buy it. It may be just me but I found it practically useless and nothing equivalent in design and layout to my Wohlberg 201 Latin Verbs fully conjugated in all tenses (Barron).
Michael
I agree with this assessment. I have a copy of All the Greek Verbs, but after a few efforts I gave up trying to use it. I’d like to read an assessment of it explaining how to use it successfully.
At the suggestion of someone on TextKit, I bought Verbi Greci by Vecchi and Sacchi some years ago. I had Tutti I Verbi Greci from my college years and rarely found the forms I was looking for. On the other hand, I use Verbi Greci every other day. It has the principal forms for 673 verbs and far more look-up verb forms than Tutti. I rarely don’t find the form I’m looking for. The fact that it’s in Italian is not much of an impediment. The only abbreviation not similar to English is “cong.” which means “subjunctive”. The one word translations of the verb in Italian should not be much of a problem since once you identify the present form you can look it up in a dictionary. It’s available on Amazon.
The idea is that if you come across an unknown form in reading, you can look it up with the book and find the dictionary form. Maybe post a form here that you’re trying to look up, and I or someone else here can describe the steps. (I never used it too much, but I do know how it works.)