Some Spellforge libraries for some popular spell packs as well as smaller spell mods I like to use. No bigger spell mods because those can already be found in Spellforge's installer.
These aren't base libraries, which means you can install all of these and Spellforge will import all of them back-to-back with no issues.

Options for:

Darenii:

Inquisition
Natura
Lunaris
Abyss
Bloodmoon
Flames of Coldharbour
Necrom
Stellaris
Vulcano
Arclight
Desecration
Arcane
Necrotic

KittyTail:

The Art of Shadow (ESL-flagged and non-ESL-flagged)
Singularity (ESL-flagged and non-ESL-flagged)
Astral Magic 2
The Witcher Signs
Sonic Magic
Storm Calling Magic 2
Constellation Magic
Winter Wonderland Magic
Abyssal Wind Magic
Abyssal Tides Magic
Obscure Magic
Dark Hierophant Magic
Frostbitten Dreams Magic

Misc:

iHarvest by IDontEvenKnow
Underwater Blast Spell by JeramyWillow
Toggleable Chameleon Spell by Squall82
Transmute Soul Gem by DrCorg
Tonal Architect by EnaiSiaion (ESL-flagged and non-ESL-flagged)
Option2's Spell Pack by... Option2
Patronus Expanded by Option2 (ESL-flagged and non-ESL-flagged)
Ocato's Recital Standalone by Raytag (ESL-flagged and non-ESL-flagged)

All libraries are ESL-flagged.