Culled from Wikipedia to explain things to non-Hindus, lest they are misled by babas and books:
Tantra:
Tantra (Lit. loom, weave, system) denotes the esoteric traditions of Hinduism and Buddhism that co-developed most likely about the middle of the 1st millennium AD. The term tantra, in the Indian traditions, also means any systematic broadly applicable "text, theory, system, method, instrument, technique or practice".
Certain modes of non-Vedic worship such as Puja are considered tantric in their conception and rituals. Hindu temple building also generally conforms to the iconography of tantra. Hindu texts describing these topics are called Tantras, Āgamas or Samhitās.
The 5th-century BC scholar Pāṇini in his Sutra 1.4.54–55 of Sanskrit grammar, cryptically explains tantra through the example of "Sva-tantra", which he states means "independent" or a person who is his own "warp, cloth, weaver, promoter, karta (actor)". Patanjali in his Mahābhāṣya quotes and accepts Panini's definition, then discusses or mentions it at a greater length.
He uses the same example of svatantra as a composite word of "sva" (self) and tantra, then stating "svatantra" means "one who is self-dependent, one who is his own master, the principal thing for whom is himself", thereby interpreting the definition of tantra.
Tantra - Wikipedia
Aghor:
Aghor (Lit. never excessive) is a spiritual tradition that originated in Northern India around the 11th Century C.E. The word Aghor literally means "that which is not difficult or terrible."Aghor is a simple and natural state of consciousness, in which there is no experience of fear, hatred, disgust or discrimination". According to Aghor, any time that humans experience a state of discrimination, we limit our wholeness and fall prey to disruptive emotions such as anger, fear, jealousy, greed, and lust.
The teachings and practices of Aghor defy easy categorization. Some adherents classify Aghor as a non-dualistic (advaita) Hindu philosophy. Classic nondualism explains that only the one eternal Self – alternately referred to as God, Brahman, or Atman – is real. Accordingly, Aghor believes that all of humanity is a part of this higher Self. Beyond this, everything else in the universe is mere illusion (maya).
Aghor focuses on the idea of jivanmukta, or reaching liberation from material issues in this lifetime. Thus, one does not have to die before reaching a state of Aghor. Any disciplined effort that one makes to connect with one's wholeness is called sadhana (spiritual practice). A consistent effort that is in tune with human nature, simple to comprehend, and easy to practice bears fruit.
Aghor - Wikipedia
(I have omitted the mention of a Baba, because babas are not keepers of a philosophy. As stated Aghor is a tantra, sva-tantra, independent, I will not debase it)