As a follow-up to yesterday's post I thought you might find the following sites helpful. Both sites offer the full text for free on-line.
Hebrew-English Interlinear (Leningrad Codex w/ vowel markings)
Septuagint Greek-English Interlinear (this appears to be an eclectic text)
For those not familiar with the Septuagint (or rather, the "Septuagints" plural---for there are several versions), a handy printed resource is a book called The Invitation to the Septuagint by Karen Jobes (published by Baker).