A fashion brand today, especially one that sells online, uses a number of different services and websites to operate the company day to day. Here’s a list of suggested services, websites and apps that I’ll update as new services come into the fold:

Shopify: for building your website. They also have iOS apps.
Google Apps: for email, docs, spreadsheets, etc
Slack: for all internal communication (it’s amazing)
TeamGantt: for timeline management and tracking projects
Xero/Quickbooks: for accounting
Mailchimp: for newsletters
Shipstation: for managing all of your shipping needs
Stripe/Paypal: for additional credit card processing
Klaviyo: for making email templates for Shopify
Makers Row: for finding factories and suppliers
Olark: for live chat on your website
Siftscience: for fraud prevention
Typekit: for web fonts
HelloSign: for signing documents online
Modest: for turning your Shopify store into an iOS app (this thing is great)
Google Analytics: good analytics tracking
Hello Bar: for A/B testing marketing and growth promotions

Uline: for buying shipping supplies email
Ecology Packaging: really good recyclable packaging
Godaddy/Domain.com: for registering domains

SolidWorks eDrawings: free mac app for viewing CAD files (your digitized patterns)