Here's what I've found so far that when developed guarantees arahantship or non-return (anāgāmi):
- Four bases of iddhi (SN 51.25)
- Four kinds of mindfulness meditation (DN 22)
- The five faculties (faith, energy, mindfulness, immersion, and wisdom) (SN 48.65)
- Mindfulness of breathing (SN 54.4)
Things that guarantee arahantship or anagami but only when the idea is combined with the seven awakening factors (mindfulness, investigation, energy, enthusiasm , tranquility, concentration. and equanimity) SN 46.57-SN 46.76:
- A Skeleton
- Worm-Infested
- Livid
- Split Open
- Bloated
- Loving-kindness
- Compassion
- Rejoicing
- Equanimity
- Breathing
- Foulness
- Death
- Repulsiveness of Food
- Dissatisfaction
- Impermanence
- Suffering in Impermanence
- Not-Self in Suffering
- Giving Up
- Dispassion
- Cessation
Things that guarantee non-return (anāgāmi) Iti 1-6:
- Abandoning greed (lobha)
- Abandoning hate (Dosa)
- Abandoning delusion (Moha)
- Abandoning anger (Kodha)
- Abandoning disdain (Makkha)
- Abandoning conceit (Māna)