TPP is a software program to help one navigate the vast amounts of Pāḷi texts. It includes, 21 English Ebooks that can be displayed side by side with the Pāḷi texts. The Dictionaries and Search functions are where TPP separates itself from the other Pāḷi readers. It is very fast and totally off-line. It works on Windows as an installable Exe or MacOS DMG file too. The project can also run on any operating system that supports FireFox Web Browser. This application was created at Pa-Auk Forest Monastery in Maymyo. The FireFox version supports Sinhala, Myanmar, Thai and Devanagiri Scripts.
There are many books and many dictionaries which can help you figure out the meaning. There are also English ePubs which let you read the translations side by side.