This implements a mana-based spell system for party members in Baldur's Gate II. You can memorize spells at any time by pressing V. You can see how many mana points remain by hitting N. When your mana points drop below 0, you will suffer a penalty, and will not be able to cast spells again until resting. Spells take away mana point values equal to their casting level, so a level 1 spell like Magic Missile will take away 1 point, and a level 3 spell like Fireball will take away 3 points. There are also slight modifications to existing spells.

The ADPack is a WeiDU-based mod for Baldur's Gate II. It aims to fix/tweak/enhance arcane and divine spells in the game's final release. Various bugs are removed, some of the weaker spells are improved, and a few spells are completely remade.
The current version is v1

A new Bhaalspawn ability, available at the Throne of Bhaal.
The current version is v1

This is a mage spell that summons a handsome and charming male companion (Male-on male only). The dialogue is exciting but not sexually explicit. For more cool stuff by Nicolai "King" Dutka: http://nicolaidutka.archongames.com

One of the most criticized elements of D&D gameplay is the magic system, and that fact that mages and preists need to sleep to regain cast spells. This criticism applies even more so to computer implementations of D&D, where it's routine to press the rest button after every battle. It's nice to be able to get spells back so easily, and it adds an element of balance, however it's not terribly good for role-playing.
The current version is v2

The Spell Revisions mod aims to fix/tweak/enhance arcane and divine spells in Baldur's Gate II. This originally started as a project to make the spell system more balanced: weaker spell have been improved, overpowered ones have been (or will be) nerfed, save-or-else spells now benefit from increased saving throw penalties, and so on.
The current version is v2

The Spell-50 mod extends a number of priest, druid and mage spell effects to level fifty. Spells cast by friends and enemies alike are modified. Basically, it's a mod for players who would like to see phenomenal cosmic spellcasting at higher levels.
The current version is v6

SpellPack™ brings many spells closer to their AD&D incarnations, whether it is a cloudkill that travels, or a chain lightning that arcs to up to 12 different creatures. Some of the spells are drawn from the Icewind Dale series rather than from AD&D.
The current version is vBeta-5

This mod adds a 7th level spell to the game, that allows the entire party teleport to the areas you've already visited. You can't teleport to all previous places, just some of the most important areas are picked up. Furthermore, you can't teleport form some other areas as well. You can buy scroll with this spell in Adventurer´s Mart and in Ust Natha.
The current version is v1.1

This Mod contains 27 new wild magic spells, some out of TSR's Tome of Magic, some out of Netbooks, and some I made up on my own.
The current version is v1.6

This mod introduces an alternative version of the standard Find Familiar spell for mages. Instead of being forced to take a Familiar based upon your alignment you will have a choice of three Familiars though the choice is still based around your alignment.
The current version is v0.5