D&D 5E List of Saving Throw Boosts

[MarkB]

The Monk's 14th level ability Diamond Soul makes them proficient in all saving throws.

 

[Paul Farquhar]

Yuan-Ti and Satyr PCs have spell resistance.

 

[DemonWolf7896]

With a 1 lvl dip into Divine Soul Sorcerer you get:

Favored by the Gods
Starting at 1st level, divine power guards your destiny. If you fail a saving throw or miss with an attack roll, you can roll 2d4 and add it to the total, possibly changing the outcome.

Once you use this feature, you can’t use it again until you finish a short or long rest.

 

[twiglegg]

Health

I'm looking for a list of all abilities/spells that can boost saving throws.

Spells
Resistance
Bless
Heroes Feast

Class Features
Bardic Inspiration
Paladin Aura
War Wizard Arcane Deflection

Items
Headband of Intellect
Amulet of Health
Gauntlets of Ogre Power
Belts of Giant Strength
Ioun Stone
Ring of Protection
Cloak of Protection

Feats
Resilient

Racial Abilities
Gnome Cunning


What else am I missing? Feel free to mention items as well.

Shield Master Feat adds your shields AC to dexterity saving throws, it also makes it impossible to take damage when you succeed.

 

[twiglegg]

Shield Master adds your shields AC to dexterity saving throws, in addition on a successful save with dex you cannot take any damage.

 

[Nikosandros]

Dwarven resilience grants advantage on saves vs poison (or to end the poisoned condition in 2024),