This addon consists of several QoL settings you can enable at your liking.

For example:

Classic/TBC/MoP/Retail:

Auto repair
Auto sell junk
Clamp nameplates
Stack nameplates in instances
Easy fishing (right click), disable nameplates while fishing
Options to collect only specific mails (Gold, Auction house expired or won, Postmaster and Artisan's Consortium)
Disable tooltip in combat
Healthbar classcolors
Tooltip when hovering items in chat
Show ID for spells, items and npcs
Custom tooltip for players
Tooltip at cursor
Auto greed and accept loot warning (be careful with this!)
Show coordinates on world map en mini map
Adjust several blizzard frames (actionbar, etc)
Make most frames movable (saving location)
Skip movies
Clickable URLs
Show timers when in queue
Auto hide playerframe and sidebars with settings (Opacity and fade timer)
Hide objectivetracker and/or minimap depending on group status (solo/party/raid)
Change camera zoom
Change viewport
Set UI scale
Slashcommand /way adds a Blizzard waypoint if TomTom is not installed
Localization (enUS, ruRU)
Auto hide several Blizzard frames: Micromenu, Actionbars, Damagemeter, vehicleseat, Compact raid frame, Bags bar
Nameplates, this is anextension of the new Blizzard nameplates and mainly aiming at friendly nameplates
a) Change nameplate font, size and outline
b) Friendly nameplates are more readable and add options for title, status, class colors, guildname
c) Add color coding to enemy npc's in instances
d) Add quest progress to nameplates
e) Add icon to people on friendlist
f) Change friendly nameplate size in pvp content
g) Add option to show icons on vendor name
h) Add option to show healer icon
Tracker for instances
Option to change chatframe font, outline and styling (Not in classic era)
Option to change objective tracker fonts, size and outline (Not in classic era)
Option to change minimap fonts, size, outline and styling (Not in classic era)
Option to change buff/debuff frame fonts, size and outline (Not in classic era)
Option to change actionbar tracker fonts, size and outline (Not in classic era)

Retail only:

Adjust several blizzard frames (talking head, event toast, achievements, etc)
Hide boss banner
Hide loot toasts while solo in raids/dungeons
Reporting Mythic key in party
Tracker for instances, quests, prey, delves, currencies and great vault
Auto untrack completed achievements

Classic/TBC/Wrath only:

Auto buy reagents depending on class (can select amount and type)
Classcolors for groupmembers on the map
Achievement broadcast in guildchat (Wrath only)

LazyHelper