This page lists links to online e-texts of Sanskrit editions of untranslated materials. Editions and manuscripts besides these exist, but are not readily linkable at present.
dīrghāgama
various fragments, including Lokuttaravāda and Sarvāstivāda, collated here and here
madhyamāgama
various fragments, including Sarvāstivāda and Mūlasarvāstivāda, collated here and here
saṃyuktāgama
various fragments, including Sarvāstivāda and Lokuttaravāda, collated here, here, and here
chatracaryā = ālavakasūttam
ekottarāgama
various fragments, Mahāsaṅghika or Dharmaguptaka, collated here
kṣudrakāgama
āryapratītyasamutpādo nāma mahāyānasūtram
āryasāgaranāgarājaparipṛcchā nāma mahāyānasūtram
daśabhūmikasūtram (prior translation possibly incomplete, see bibliography)
gaṇḍavyūhasūtram (translation from Sanskrit incomplete)
guṇakāraṇḍavyūhasūtram (translation ongoing)
lalitavistaraḥ (translation from Sanskrit incomplete)
sahajayāna
yoginītantra
buddhakapālatantram (Chapters 9–14 complete)
ḍākārṇavaḥ (Translation of different section complete, location in text of DSBC selection not clear)
tantradarśana
niṣpaṇṇayogāvali (Chapter 26 complete, e-text incomplete)
yogatantra
sarvadurgatipariśodhanatantram
kriyātantraṭīkā
mahāsāṅghikānāṃ pratimokṣasūtram
a. nidāna
b. gurudharmas
See also: TLB
upasampadājñaptiḥ (mūlasarvāstivāda?)
abhidharmadīpaṭīkā (vibhāṣāprabhāvṛttisahitaḥ)
abhidharmasamuccaya (partially reconstructed)
āryadharmadhātugarbhavivaraṇam
sphuṭārthā abhidharmakośavyākhyā
āryamāyājālamahātantroddhṛtamaṇḍalagāthāṭippaṇī
sekoddeśaṭīkā paramārthasaṃgraha
chandoratnākaraḥ (svopajña samanvitaḥ)
gurupañcāśikā (translation from Tibetan exists)
madhyamakahṛdayaḥ (partially translated)
Prajñākaragupta's pramāṇavārttikabhāṣyam