This is a list of works originally composed in Latin for which a Greek translation exists on the Internet (mostly on Google Books). Obviously, the percentage of Greek works translated into Latin is much higher.
More or less contemporary translations
Res Gestae Divi Augusti
Eutropi Breviarium ab urbe condita translated by Paeanius sophist
De viris illustribus St. Jerome
SANCTI GREGORII PAPAE DIALOGORUM LIBRI IV
Patrologiae cursus completus ... Series latina prior .. : Migne, J.-P. (Jacques-Paul), 1800-1875, editor : Free Download, Borrow, and Streaming : Internet Archive I, III, IV
Sancti Aurelii Augustini Hipponensis episcopi Opera omnia : post Lovaniensium theologorum recensionem castigata denuo ad manuscriptos codices Gallicanos, Vaticanos, Belgicos etc. necnon ad editiones antiquiores et castigatiores : Augustine, of Hippo, Saint, 354-430 : Free Download, Borrow, and Streaming : Internet Archive II
Byzantine translations
Translation by Maximus Planudes
Heroides Ovid
Metamorphoses Ovid
Epistulae XX et XXI
De consolatione philosophiae Boethius
Carmina - Boethius
De bello gallico
Disticha Catonis
De Trinitate
http://www.bl.uk/manuscripts/FullDisplay.aspx?ref=Harley_MS_5687
M.T. Ciceronis Cato Maior, Somnium Scipionis, Laelius et Paradoxa
Gaza, Planudes,Petau, Turnèbe
Other translations
M. Tullii Ciceronis Paradoxa Graece versa et explicata ab Joanne Morisoto
Greek colloquies
Jesuits
Officium corporis Christi
Catechismus gr., lat. et gallice
By saint Petrus (Canisius)
De Imitatione Christi Libri quatuor
By Thomas a Kempis, Mayr
Vita B. Ignati Societatis Iesu Fundatoris
Litaniae De Venerabili Sacramento Eucharistiae. Item Sequentia S. Thomae
Officium Beatae Mariae Virginis Latinograecum: Ad Latinum editionem Romae …
By Georg Mayr
Fascicvlvs Sacrarvm Litaniarvm
Quattuor dialogi ex Progymnasmatis Jacobi Pontani, Societatis Jesu, Graece
redditi
Greek Dialogues, Hymns, Prayers, the Catechism and Dionysius Cato from Jacob Gretser S. J. Rudementa Linguae Graecae, edited by Fergus Walsh
P. Stanislav Rapal SJ
GYMNASION GRAECO-LATINUM: Piarum precum & Sacrorum Hymnorum, tam in publicis quam privatis devotionibus A studiosa Juventute Collegii Vratislaviensis Societatis Jesu frequentari solitum. In ejusdem Studiosae Juventutis ac Omnium FIL[H]ELLENON Gratiam & usum concinnatum
Works by Comenius
Orbis pictus
Vestibulum
Janua Linguarum Reserata
https://drive.google.com/folderview?id=0BwyQgrJPS6GBXzhmSEFYRWR0ekE&usp=sharing
Scientiarum Elementa Gr. et Lat. sibi quædam ex J. C. Opere notissimo
On the subject
De Latine scriptis quæ Græci veteres in linguam, suam transtulerunt
Carolus Fridericus Weber
De romanorum juris publici sacrique vocabulis sollemnibus in graecum sermonem conversis
David Magie