Sanskrit Wikisource: साधनपञ्चकम् (1 page; revision ids 329133, full list in content/corpus/wikisource cache) — Traditionally ascribed to Śaṅkara; the ascription of the shorter works is debated by scholars.
Sanskrit Wikisource (sa.wikisource.org): the texts are public domain; page markup CC BY-SA 4.0. Devanagari as given on the page; IAST generated mechanically.