Vranx

Hide the Default CastBar

If all you want to do is hide the castbar try x3CastBarHider.

AdiCastBars Adirelle

AdiCastBar is a small, simple casting bar addon. Features: Replace Blizzard casting bar, Player casting bar with integrated latency and pushback display, Big target casting bar, Global cooldown display, Bars can be moved and slightly configured using the /adicastbar chat command, Alternative bar texture can be selected by using SharedMedia and !SurfaceControl, ConfigMode support.
Curse

AzCastBar Aezay

A highly customizable and lightweight casting bar replacement mod with support for saved profiles and plugins. Originally comes with the following plugins: casting bar for player, target, focus and pet, as well as a mirror bar. The Mirror Bar is the one which shows breath, feign death and fatigue.
Config: /acb
WoWInterface, Curse, Plugins

CastBars xbeeps

Castbars is a lightweight enhancement of the Blizzard Casting Bar and Mirror Timer Bars. Castbars works by modifying the existing Blizzard Casting Bar and Mirror Timer Bars and makes heavy reuse of the existing Blizzard code for driving all frames.
Curse

CastDonut Ammo

CastDonut adds an inobtrusive circular castbar and global cooldownbar around the mousecursor. Specially useful and written for clickcasting healers using Clique or similar addons.
WoWInterface, Curse

CircleCast Nuckin

A circular cast bar..
WoWInterface, Curse

eCastingBar NeuroMedivh

eCastingBar is a movable and configurable casting bar replacement. It includes a Mirror Bar that handles Breathing, Feign Death, and Exhaustion, as well as a new Target Bar, showing what your target is casting.
WoWInterface, Curse

Gnosis elchefe

Gnosis is a highly configurable castbar addon, but featuring much more than simple castbars. Gnosis can show ticks of channeled spells, detect unintentional clipping while channeling and combine data of channeled spells to combat text addons (MSBT, SCT, Parrot).
Curse, WowInterface

LonnyCastingBar Lonny

Moveable casting bar.
WoWInterface

oMirrorBars Haste

oMirrorBars is an add-on designed to replace the MirrorTimers (breath bar and so on). oMB is not a castingbar replacement.
WoWInterface

Quartz Nymbia, Nevcairiel

Modular approach to a casting bar addon. An overview of (hopefully most of) the modules: player, target, focus, buffs, flight, global cooldown, interrupt, latency, mirror, range, swing, timer, tradeskill merge. The core of Quartz is lightweight implementation of a standard casting bar, with configurable size, text and icon positioning, and colors.
Curse, Tutorial Movie

tPlayerCastbar thek

tPlayerCastbar redesigns Blizzards default Castingbar and enables drag & drop for it.
WoWInterface