Accounting & Finance Tools

1. Xero
   Cloud-based accounting software for small businesses. Manage finances, invoicing, and reporting with ease.

2. HMRC
   The official government site for tax information, VAT registration, self-assessment, and other important services.

3. QuickBooks
   A popular accounting tool for managing invoices, expenses, and tax reporting for small businesses.

4. FreeAgent
   Simple accounting software designed for freelancers and small business owners, helping to manage invoicing, expenses, and tax returns.
    

Banking Resources

1. Zempler
   Innovative digital banking for businesses with powerful tools for managing expenses, payments, and financial operations. Designed for start ups and entrepreneurs looking for a simple, effective banking solution.

2. Revolut Business
   A digital-first business banking solution designed to help businesses manage their accounts, payments, and finances with ease. Features include multi-currency accounts, expense management, and easy integrations with accounting tools.
    

Insurance Resources

1. Simply Business
   A trusted online broker offering tailored business insurance for freelancers, sole traders, and small businesses. Get instant quotes for public liability, professional indemnity, and more.

2. SimplyBee
   Simple and affordable insurance solutions designed for small businesses and self-employed individuals. Offers coverage for everything from liability to property insurance.
    

Business Management & Development Tools

1. Trello
   A flexible and easy-to-use project management tool that helps teams stay organized.

2. Asana
   Task and project management software designed to help teams collaborate and track work.

3. Slack
   Communication platform for teams to share messages, files, and keep work organized in channels.

4. Monday.com
   Visual project management tool for team collaboration, tracking progress, and automating workflows.
    

Legal & Compliance Resources

1. Companies House
   The UK government agency for company registration and filing corporate documents.

2. ACAS
   Provides free, impartial advice on employment law, workplace rights, and resolving disputes.

3. GOV.UK - Business & Self-Employed
   Official portal for businesses and the self-employed in the UK, providing access to all necessary business regulations.
    

Government & Business Support

1. Start Up Loans
   Government-backed loans for starting and growing small businesses in the UK.

2. Small Business, Enterprise & Employment
   Access policies and support for small businesses, including grants and funding opportunities.

3. UK Small Business Association
   Provides resources, advocacy, and networking for small businesses and entrepreneurs in the UK.

4. StartUp Britain - GOV.UK Britain
   National campaign to support British start-ups with advice, resources, and networking opportunities.
    

Training & Development

1. Coursera
   Online courses from top universities and companies on topics ranging from business to marketing.

2. LinkedIn Learning
   Professional development courses to help you improve skills in business, technology, and creative fields.

3. FutureLearn
   Offers a variety of online courses from leading UK universities to help you learn new business skills.
    

Marketing & Social Media Tools

1. Google Analytics
   Free tool to track website performance, traffic, and user behaviour.

2. Buffer
   Social media management tool that helps you schedule and analyse posts across multiple platforms.

3. Hootsuite
   A social media management platform that allows you to schedule posts, track mentions, and monitor performance.

4. Mailchimp
   Email marketing platform for creating campaigns, automating outreach, and analysing performance.
    

Networking & Community Support

1. Meetup
   Find or create local events to connect with entrepreneurs, freelancers, and other like-minded individuals.

2. Eventbrite
   Platform for finding and creating events, workshops, and networking opportunities.

3. StartUp Grind
   A global community of entrepreneurs and startups, offering events, networking, and resources.
    

Freelancer & Entrepreneur Tools

1. Fiverr
   Platform to hire freelancers or offer your own services in a variety of categories, from design to marketing.

2. Upwork
   Freelance marketplace where businesses can post jobs and freelancers can offer services.

3. Freelancer.com
   Another popular platform for freelancers and businesses to connect on projects across various industries.
    

SelfStart Resources

1. SelfStart Blog
   Tips, advice, and insights for entrepreneurs and small business owners.

2. SelfStart Courses
   Online courses designed to teach you the skills you need to start and grow your business.

3. SelfStart Community
   Join our vibrant community to share insights, ask questions, and get support from fellow entrepreneurs.

4. Contact Us
   Get in touch with us for any inquiries or support related to business development.
    

Additional Resources

1. Seedrs
   Crowdfunding platform that connects entrepreneurs with investors to raise capital.

2. Crowdcube
   Another popular crowdfunding platform where start ups can raise funds from the public.

3. UK Business Angels Association
   A network of business angels and investors, offering funding opportunities for start ups and entrepreneurs.