I thought I'd list the links to some of the pdf's available from Google Books. I know these are only downloadable to those of us in the US, but here they are:
D'Ooge
Elements of Latin
Second Year Latin
Latin Composition for Secondary Schools
De particularum copulativarum apud Caesarem
Caesar's Gallic war: (Allen and Greenough's edition)
Colloquia latina: Adapted to the Beginners' Books of Jones, Leighton, and Collar and Daniell
Latin Grammars
Latin Grammar (Bennet, 1908)
Bennett's New Latin Grammar (1918)
Gildersleeve's Latin Grammar (1898)
Latin Grammar for Schools and Colleges (GM Lane, 1903)
Latin Grammar (Rev. J. Arnold, 1854)
Latin Grammar (L. Direy, 1859
Latin Grammar (Rev. Henson, 1744)
Latin Grammar (T. Hewitt Key, 1858)
An Elementary Latin Grammar (Augustus S. Wilkins, 1876)
Grammar of the Latin Language (K.G. Zumpt, 1829)
Latin Books with Answer Keys
Latin Exercises (w.W. Bradley, 1855)- Key inside book
Latin Elegiac Verse (Rev. C.G. Gepp, 1874)- Key
Easy Exercises in Latin Elegiac Verse (Rev. J. Penrose, 2852)- Key
First Latin Writer (Bennet, 1879)- Key
Materials for Latin Prose (P. Frost, 1852)- Key
Key to Latin Made Easy (Rev. J.R. Beard, 1853)
Easy Latin Stories for Beginners (Bennett, 1878)- Key
Latin Course - 2nd Year (T.T. M'Lagan, 1883)- Key
Elements of Latin hexameters and pentameters (R. Bland, 1822)- Key- Vocabulary
Progressive exercises in Latin lyrics (J. Edwards, 1835)- Key
First Latin Exercise Book- Key
Short exercises in Latin prose composition, Part 2 (R.H. Belcher, 1879)- Key
First Latin Exercise Book (J.T. White, 1867)- Key
Exercises in Latin Prose Composition (Rev. A. Beverly, 1868)- Key
New Latin Verse Book (P. Frost, 1867)- Key
Latin Readers
Latin Reader (Jacobs & Döring, 1837)
Latin Reader (Allen & Allen 1869)
Latin Reader (Harkness, 1874)
New Latin Reader with Exercises in Latin Composition (Harkness, 1881)
Via Latina: An Easy Latin Reader (1897)
Ritchie's Fabulae Faciles: A First Latin Reader (1903)
Easy Latin Stories for Beginners (Bennett, 1878)- Key
Second Easy Latin Reading Book (Rev. E Fowle, 1873)
Second Latin reading book (Bennett, 1882)
Other Latin Books
Syntax of Early Latin (Bennett, 1914)
Latin Language: An Historical Account of Latin Sounds, Stems and Flexions (W.M. Lindsay, 1894)
Introduction to the Study of Latin Inscriptions (J.C. Egbert, 1896)
Demonstrations in Latin Elegiac Verse (W.H. Denham, 1899)
Key to Latin grammar and junior scholarship papers (J.H. Raven, 1884)
First and Second Latin Book and Practical Grammar (T. K. Arnold, 1870)
Greek Grammars
Greek Grammar for Schools and Colleges (H.W.Smyth, 1916)
Greek Grammar for Schools and Colleges (J. Hadley, 1912)
Greek Grammar for the Use of Schools and Colleges
Greek Grammar (W.W. Goodwin, 1900)
Elements of Greek Grammar (Valpy & Anthon, 1834)
Elements of Greek Grammar: Used in Yale College (Goodrich & Hachenberg, 1833)
Grammar of the Greek Language (Kühner & Edwards, 1844)
Copious Greek Grammar v. I (Bloomfield & Matthiae, 1832)
Copious Greek Grammar v. II (Bloomfield & Matthiae, 1832)
Elements of the Greek Language (Moor, Blatchford & Ewing, 1807)
First Greek Grammar (Rutherford, 1880)
Greek Grammar for the Use of Learners (E.A. Sophocles, 1838)
Syntax of the Greek Language: Especially of the Attic Dialect (Madvig, Browne & Arnold, 1853)
Greek Books with Answer Keys
First Steps to Greek Prose Composition (B. Jackson, 1875)- Key
First Greek Book (T. K. Arnold, 1849)- Key
Second Greek Book (T. K. Arnold, 1852)- Key
Practical Introduction to Greek Prose Composition (T. K. Arnold, 1850)- Key
First Greek Writer, with Exercises (A. Sidgwick, 1880)- Key
New Greek Delectus (H. M. Wilkins, 1880)- Key
Exercises in the Composition of Greek Iambic Verse (H. Kynaston, 1879)- Key
Elementary Grammar of the Greek Language (Kühner & Taylor, 1853)- Key
Greek Readers
Greek Reader (F. Jacobs, 1841)- Translation
Greek Reader: Selected Chiefly from Jacobs' Greek Reader (P. Bullions, 1859)
Greek Reader: Containing Selections from Various Authors (J. Owen, 1868)
Specimens of Greek Dialects: Being a Fourth Greek Reader (W. W. Merry, 1875)
First Greek Reader (W. G. Rushbrooke, 1892)
Fifth Greek Reader (E. Abbott, 1875)
Old Greek Stories: Third Reader Grade (J. Baldwin, 1895)
First Greek reader (Mayor & Halm, 1868)
Greek reader, selected principally from the (Elementarbuch) of F. Jacobs (C. Anthon, 1844)
Tales from Herodotus with Attic Dialectical Forms: Selected for Easy Greek Reading (Herodotus, 1895)
Stories from Herodotus in Attic Greek (Herodotus, 1882)
Stories in Attic Greek (F. D. Morice, 1883)
Homer
Iliad - Edited with English Notes v. I (W. Leaf, 1886)
First Six Books of Homer's Iliad (J. Boise, 1869)
Concordance to the Iliad of Homer (Prendergast & Marzullo, 1869)
Homer's Odyssey v. I (Merry & Riddell, 1886)
Homer's Odyssey: books I-IV (B. Perrin, 1889)
Odyssey of Homer; Books I-XII (G. H. Palmer, 1884)
Homer's Odyssey, Books XIII-XXIV (H. Monro, 1901)
Complete Concordance to the Odyssey and Hymns of Homer (H. Dunbar, 1880)
Other Greek Books
Hints and cautions on Attic Greek prose composition (F. Thackeray, 1876)
Greek Exercises; Or, An Introduction to Greek Composition (Edward, Valpy, Dawes & Porson, 1831)
Introduction to Greek Prose Composition, with Exercises (A. Sidgwick, 1880)
Practical Introduction to Greek Prose Composition (T. K. Arnold, 1899)
Greek Prose Composition for Use in Colleges (E. H. Spieker, 1904)
Pronunciation of Ancient Greek (F. Blass, 1890)
Key to the Classical Pronunciation of Greek and Latin Proper Names (J. Walker, 1798)
Aspects of the Speech in the Later Greek Epic (G. W. Elderkin, 1906)
EDIT: I've expanded the list quite a bit and included non-Google sources, but it's getting to unmanageable to post here (around 250 pdf's). Instead, I'll keep it updated here: G'Oogle. If you have any good ones for me to add, just pm me.
And it keeps giving me this response thereafter:
