The Septuagint This site is a fantastic gateway to many sites with various texts and study aids.
Interlinear Septuagint Greek and English This great site provides free PDF's of interlinear texts of each book of the Septuagint.
Septuagint Greek and English This text can be viewed in images of the original print edition though that can be rather time consuming and difficult to navigate
Septuagint Text Greek this uses the symbol font and thus has no accents or breathings -- also, the data entry person didn't know how to enter a final sigma so they appear as medial sigmas

Septuagint Text Greek These are Adobe PDF files with accents and breathings. No special fonts are required to read these

NETS New English Translation of the Septuagint project.

Links to study helps with the Septuagint

• International Organization for Septuagint and Cognate Studies a nonprofit, learned society formed to promote international research in and study of the Septuagint and related texts.
• Conybeare and Stock Septuagint Grammar an etext available online (1905 release). A free pdf download of the text is available here. This text has annotated selections and an introductory grammar to the Greek of the Septuagint.
• Perseus Lexicons Enter either Greek or English words.
• Septuagint Course Outline and Bibliography The outline and bibliography are helpful, but there are other broken links on this page.
• Decker's Septuagint Reading Helps Rodney Decker's great page. Course outline, bibliography, texts, reading notes, and resources.
• Orthodox Study Bible This site is a work in progress but does contain notes on some passages.
• New English Translation of the Septuagint Another work in progress but looks to be helpful.