Here is a list of helpful SWL websites:

TSWDB
one of the biggest resources around, builds, mission guides, cosmetics, achievements, etc.

SWL/TSW Mods on Curse
Lots of useful mods for SWL/TSW

SWLMarket
Tracks in-game prices of items for both historical and current data.

SecretFox.github.io
Online deck builder for SWL

SecretFox Mods
SecretFox makes a ton of useful and unique mods for SWL

TSW Chat Commands
useful list of chat commands

Daestrus’ Occult Museum SWL (Blank)
Occult Museum cost/checklist sheet

Here are the mods I use:

Autosprint
This addon enables automatically sprint for you whenever possible

BooBuilds
Saves builds, outfits, and has a visual favorites bar

Effects UI: Legends
Monitors active effects and abilities-as-they-cast with multiple types of visualization – bars, warning text, counters, text logs, TSW style icons, etc!

FiveAlive
A custom group/raid window mod from TSW that someone ported to SWL

LairTracker
Proximity alerts for not only lair items but side mission items in general, a must have for South Africa

LoreHound
Proximity alerts when approaching lore pickups

PhotoMode
PhotoMode mod for Secret World Legends (including Freefly camera!)

SWLMarket Addon
Addon to help keep the SWLMarket updated

Tradepost Utility
Stores the sell price and exp date, price check option, auto search when selling

Valyrie’s Friends Enhanced
added some much needed functionality like preferred player roles and personal notes about players.

Valyrie’s Infarmer
keeps a visual track on-screen of the progress of selected achievements

TSWACT
for parsing DPS, this link will help with installation and setup for ACT, it’s TSW plugin, and the TSW addon