[PF]There is more Ways to enhance summoning?

[isildur]

I know Summoner's charm, superior summoning, Augment Summonig, acadamae graduate.

And... this is it?

[NightbringerGGZ]

I know Summoner's charm, superior summoning, Augment Summonig, acadamae graduate.

And... this is it?

Moonlight Summons, Nimble Natural Summons, Summon Good Monster, Sunlight Summons, True Name, Greater True Name

Those would be a few to look up. There's additional race-specific feats too, they're not all that great though.

[Karoht]

I think they all apply to calling as well, stuff like Planar Binding/Planar Ally.