Talking to Customers

• Intercom
  Tasteful chat and help widgets for your site, plus good automated email triggers
• Drip
  Email courses and signup widgets for your site
• Mailchimp
  Newsletters and decent signup widgets
• Buffer
  Easier way to run your twitter and facebook accounts

Domains

• Lean Domain Search
  Suggests all available .coms with a given keyword somewhere in the name
• Instant Domain Search
  Quickly check specific domain availability
• Namecheap
  Register your domains without getting screwed

Payments

• Square (US) or iZettle (elsewhere)
  Accept credit card payments with your phone, e.g. for market stalls and contractors
• Stripe
  Best payment processing online
• GoCardless (UK)
  Accept direct debit payments
• Gumroad
  Easily sell digital files like PDFs, videos, and links

Analytics

• Google Analytics
  Free and good enough for all your analytics needs
• Google Keyword Planner
  See how many people are searching relevant terms
• Facebook Ads
  Use the targeting options to compare the approximate size and location of various interests and demographics

Physical Products and Print-on-Demand

• Createspace
  Upload a PDF, sell a printed book via Amazon
• Newspaper Club
  Ever wanted your own newspaper?
• The Game Crafter
  Prototype and sell your board and card games

Team Collaboration

• Slack
  Chat and messaging to reduce internal email load, with one room per major project
• Github
  Repository for your source code plus task lists and collaboration with your developers
• Dropbox
  All company files should be here, not on email attachments or personal folders
• Streak
  Simple CRM plugin for Gmail to manage and share your sales leads
• Trello
  Digital kanban board for project management
• Basecamp
  I use it for project management with external teams who don't know our Trello workflow
• Stormboard
  Digital sticky notes for remote brainstorming and workshops
• Meldium
  Team password sharing and management

Building Websites

• Squarespace
  Visual site builder with good themes and integrations with stores, payments, newsletters, etc
• Strikingly
  Easy site builder for nice single-page sites like manifestos, personal/company pages, or landing pages
• Shopify
  For ecommerce and online stores

Art

• Glyphicons
  Awesome Set of Free Icons
• 500px
  Non-cheesy stock photography
• Flickr Creative commons
  Search for photos with the appropriate usage rights
• Subtle Patterns
  Pretty much what it says on the tin; for backgrounds and textures

Legals

• Docracy
  Open source legal documents
• Companies Made Simple (UK)
  Set up and manage a UK corporation for 19
• Duedil (UK)
  Nice interface over companies house interface to research competitors