An excellent Russian-language dictionary, that will take a word in any form and give you its “dictionary-entry” form, all possible declensions/conjugations, definitions, and usages (in Russian only).
Lib.ru contains hundreds of Russian novels, poems, articles, short stories, and other forms of literature, all in the original. Texts are not PDFs, and so can be copy/pasted into word processors and edited, making it an excellent resource for quoting original Russian, in addition to granting free access to hundreds of classics. The site is in Russian.
The Russian Wikitionary provides a great deal of grammatical information about any word, including perfective/imperfective aspect, conjugations/declensions, stems and pre/suffixes, pronunciation.
Two podcasts for practicing listening. Both available on Apple Podcasts.