I recommend using Curse installer as the manager for the add-ons. Alternatively you will want to locate the hidden AppData directory in your User folder.
Personally I found the below-mentioned useful (and running them on my setup):
WARNING! DO NOT DOWNLOAD AND INSTALL ALL AT ONE GO! YOU WILL BE OVERWHELMED BY THE AMOUNT OF NEW WINDOWS!
BetterGuildFrame: http://www.curse.com/ws-addons/wildstar/222164-betterguildframe
BetterQuestLog: http://www.curse.com/ws-addons/wildstar/220027-betterquestlog
BetterPartyFrames: http://www.curse.com/ws-addons/wildstar/221431-betterpartyframes
BetterMarketPlace: http://www.curse.com/ws-addons/wildstar/221155-bettermarketplace
BetterRaidFrames: http://www.curse.com/ws-addons/wildstar/222170-betterraidframes
BijiPlates: http://www.curse.com/ws-addons/wildstar/220006-bijiplates
(CAUTION: RESOURCE INTENSIVE!)
CandyBars: http://www.curse.com/ws-addons/wildstar/220175-candybars
(READ THE PAGE ON HOW TO REMOVE THE DEFAULT ACTION BARS)
ChatFixed: http://www.curse.com/ws-addons/wildstar/221187-chatfixed
ClassicQuestDialog: http://www.curse.com/ws-addons/wildstar/220069-classicquestdialog
CompactXPBar: http://www.curse.com/ws-addons/wildstar/221441-compactxpbar
Crowd Control UI Fix: http://www.curse.com/ws-addons/wildstar/221427-crowd-control-ui-fix
EnemyHPBars: http://www.curse.com/ws-addons/wildstar/221467-enemyhpbars
EntSpy: http://www.curse.com/ws-addons/wildstar/221350-entspy
(A MUST DOWNLOAD FOR VET MALGRAVE!)
ForgottenChat: http://www.curse.com/ws-addons/wildstar/221406-forgottenchat
GroupRadar: http://www.curse.com/ws-addons/wildstar/220370-groupradar
Guard Mini Map: http://www.curse.com/ws-addons/wildstar/221436-guard-mini-map
Hephaestus: http://www.curse.com/ws-addons/wildstar/220424-hephaestus
(BATCH CRAFTING)
IconLoot: http://www.curse.com/ws-addons/wildstar/220033-iconloot
(RARE LOOT INDICATOR)
Interruptor: http://www.curse.com/ws-addons/wildstar/220057-interruptor
(MUST DOWNLOAD FOR VET AND RAID!)
Movable Frames: http://www.curse.com/ws-addons/wildstar/220119-movable-frames
MrFancyPants Equipment Manager: http://www.curse.com/ws-addons/wildstar/221157-mrfancypants
(NO MORE LAS AND EQUIPMENT CONFUSION!)
PotatoUI: http://www.curse.com/ws-addons/wildstar/220026-potatoui
ProcsHUD: http://www.curse.com/ws-addons/wildstar/220192-procshud
RunecraftingFix: http://www.curse.com/ws-addons/wildstar/221354-runecraftingfix
(ACCESS RUNECRAFTING LIST ANYWHERE)
Super Minimum Datachron (SMDC): http://www.curse.com/ws-addons/wildstar/220409-super-minimum-datachron
SpaceStash: http://www.curse.com/ws-addons/wildstar/220186-spacestash
(BUG NEEDS YOU TO REFRESH EVERY LOGON/RELOAD)
TapThat: http://www.curse.com/ws-addons/wildstar/220863-tapthat
ThreatMeter: http://www.curse.com/ws-addons/wildstar/220035-threatmeter
TrackMaster: http://www.curse.com/ws-addons/wildstar/220025-track-master
VendorAlertMessageMover: http://www.curse.com/ws-addons/wildstar/220978-vendoralertmessagemover
ZenRadar: http://www.curse.com/ws-addons/wildstar/220363-zenradar
Personally I found the below-mentioned useful (and running them on my setup):
WARNING! DO NOT DOWNLOAD AND INSTALL ALL AT ONE GO! YOU WILL BE OVERWHELMED BY THE AMOUNT OF NEW WINDOWS!
BetterGuildFrame: http://www.curse.com/ws-addons/wildstar/222164-betterguildframe
BetterQuestLog: http://www.curse.com/ws-addons/wildstar/220027-betterquestlog
BetterPartyFrames: http://www.curse.com/ws-addons/wildstar/221431-betterpartyframes
BetterMarketPlace: http://www.curse.com/ws-addons/wildstar/221155-bettermarketplace
BetterRaidFrames: http://www.curse.com/ws-addons/wildstar/222170-betterraidframes
BijiPlates: http://www.curse.com/ws-addons/wildstar/220006-bijiplates
(CAUTION: RESOURCE INTENSIVE!)
CandyBars: http://www.curse.com/ws-addons/wildstar/220175-candybars
(READ THE PAGE ON HOW TO REMOVE THE DEFAULT ACTION BARS)
ChatFixed: http://www.curse.com/ws-addons/wildstar/221187-chatfixed
ClassicQuestDialog: http://www.curse.com/ws-addons/wildstar/220069-classicquestdialog
CompactXPBar: http://www.curse.com/ws-addons/wildstar/221441-compactxpbar
Crowd Control UI Fix: http://www.curse.com/ws-addons/wildstar/221427-crowd-control-ui-fix
EnemyHPBars: http://www.curse.com/ws-addons/wildstar/221467-enemyhpbars
EntSpy: http://www.curse.com/ws-addons/wildstar/221350-entspy
(A MUST DOWNLOAD FOR VET MALGRAVE!)
ForgottenChat: http://www.curse.com/ws-addons/wildstar/221406-forgottenchat
GroupRadar: http://www.curse.com/ws-addons/wildstar/220370-groupradar
Guard Mini Map: http://www.curse.com/ws-addons/wildstar/221436-guard-mini-map
Hephaestus: http://www.curse.com/ws-addons/wildstar/220424-hephaestus
(BATCH CRAFTING)
IconLoot: http://www.curse.com/ws-addons/wildstar/220033-iconloot
(RARE LOOT INDICATOR)
Interruptor: http://www.curse.com/ws-addons/wildstar/220057-interruptor
(MUST DOWNLOAD FOR VET AND RAID!)
Movable Frames: http://www.curse.com/ws-addons/wildstar/220119-movable-frames
MrFancyPants Equipment Manager: http://www.curse.com/ws-addons/wildstar/221157-mrfancypants
(NO MORE LAS AND EQUIPMENT CONFUSION!)
PotatoUI: http://www.curse.com/ws-addons/wildstar/220026-potatoui
ProcsHUD: http://www.curse.com/ws-addons/wildstar/220192-procshud
RunecraftingFix: http://www.curse.com/ws-addons/wildstar/221354-runecraftingfix
(ACCESS RUNECRAFTING LIST ANYWHERE)
Super Minimum Datachron (SMDC): http://www.curse.com/ws-addons/wildstar/220409-super-minimum-datachron
SpaceStash: http://www.curse.com/ws-addons/wildstar/220186-spacestash
(BUG NEEDS YOU TO REFRESH EVERY LOGON/RELOAD)
TapThat: http://www.curse.com/ws-addons/wildstar/220863-tapthat
ThreatMeter: http://www.curse.com/ws-addons/wildstar/220035-threatmeter
TrackMaster: http://www.curse.com/ws-addons/wildstar/220025-track-master
VendorAlertMessageMover: http://www.curse.com/ws-addons/wildstar/220978-vendoralertmessagemover
ZenRadar: http://www.curse.com/ws-addons/wildstar/220363-zenradar