Sales:

Customer Relationship Management - including workflows and Instant Actions to automate the boring stuff.

SalesIQ - Engage visitors to your site with online chat - yes, it's mobile ready too!

Contact Manager - for those on your team not needing a full CRM.

Motivator - gamification to entice your sales team to their best performance.

Analytics - You can't improve what you can't measure.

SalesInbox - an email client designed specifically for sales people.

Marketing:

Sites - A simple yet powerful way to create, manage, and deploy your websites and landing pages.

Campaigns - Email Marketing, including Auto-responders (drips)

Social - Post and track conversations across multiple social media sites from one place.

Survey - Get the best feedback from your customers.

Forms - Powerful yet simple online forms for lead generation and engagement.

PageSense - Web page optimization tools. Know what your prospects look at, and for how long.

Backstage - Run awesome events.

MarketingHub - integrated marketing automation tools.

Support:

Desk - multi-channel help desk solution that helps you prioritize support requests from your customers.Includes a Customer Portal!

Assist - remote troubleshooting tool, also mobile ready!

Communications:

Mail - a great, secure, ad-free email system for your whole business.

Cliq - Quick, informal messaging to keep teams in the loop.

Collaboration:

Projects - plan, track and collaborate on projects - with a portal for your customers too!

Sprints - project Management the Agile way.

Connect - a private social network for your organization and teams.

Showtime - web-conferencing tool that's great for virtual training.

Meeting - browser-based conferencing great for presentations and demos.

Productivity:

Writer - collaborate on documents with this online word processor.

Sheet - powerful collaborative cloud spreadsheets.

Show - collaborate on slide decks for awesome presentations.

Docs - store and share files with teammates, vendors, partners, and customers.

Sign - sign and request signatures with digital documents.

Notebook - simple note-taking tool to help order your life.

Vault - secure management of all your teams' passwords for all their applications.

Finance:

Books - full online accounting solution, including a portal for your customers to track their invoices and payments.

Invoice - design and track professional invoices that help you get paid.

Subscriptions - for billing customers on a recurring or subscription basis.

Expense - manage receipts, expense reports, and expense approvals.

Inventory - a central IMS for even distributed sales channels or marketplaces.

Checkout - Collect payments online.

Human Resources:

People - manage employees, approvals, performance, and more.

Recruit - helps your in-house recruiter or staffing agency find new talent. 

Business Processes:

Creator - build customer applications to meet your unique business needs.

Flow - visually build connections between your various applications for even better automation.

Analytics - Business Intelligence platform for getting insights on your whole business.

And More, such as browser plug-ins, business card scanner, and apple watch integrations 

among others.