Along the same lines as the flashcard generators discussed in the thread Greek noun declension Anki study
http://discourse.textkit.com/t/greek-noun-declension-anki-study/13065/1
(these are Joel’s project
https://github.com/jeidsath/ankigreeknouns
and my modified version at
https://github.com/tallguy76/ankigreeknouns
both of which generate cards for nouns from Smyth and all forms of λυω)
I have made a small tool that generates flashcards for the principal parts of verbs, given a CSV.
https://github.com/tallguy76/greekverbflashcards
If you have a spreadsheet file containing the principal parts of verbs that you are studying, you should be able to export to CSV and use my tool to generate a good set of flashcards for them. If running command-line tools takes you out of your comfort zone, you can try downloading the sample files (Hansen and Quinn Units 1-15) in the repository and loading them into Anki.
https://github.com/tallguy76/greekverbflashcards/raw/master/verbs.txt
https://github.com/tallguy76/greekverbflashcards/raw/master/verbs_reverse.txt
Please let me know what you think of these card designs and if you find errors.