Questie - Download A quest helper for World of Warcraft: Classic
Recount - Download Check your DPS meters, this a version of the Recount add-on for retail WoW that works with WoW Classic.
ClassicCastBars - Download Adds castbars to TargetFrame and nameplates in Classic World of Warcraft 1.13.x. You may toggle which unitframes you want to see castbars for.
OneBag3 Classic - Download One bag to rule them all.
Gatherer - Download Gatherer is an addon for herbalists, miners and treasure hunters in World of Warcraft. It’s main purpose is to track the closest plants, deposits and treasure locations on you minimap.
NameplateDistance - Download Increases the default nameplate distance to 80 yards.
OmniCC Classic - Download OmniCC is an addon that adds text to items, spell and abilities that are on cooldown to indicate when they will be ready to use. In other words: it turns all the standard analogue cooldowns into digital ones.