Google.com/drive: Drive provides you with 15 GB of online storage.
Onedrive.live.com: Microsoft storage with 15 GB of storage is a natural for 365 users.
Box.com The Personal plan offers 10 GB of free storage. Box is a business favorite.
Insightly.com: Including project management for up to 2 users. Good integration.
Zoho.com/crm: Free for up to 10 users. Scalable with good reporting features.
Google.com/Docs: Web-based office suite with sharing and real-time collaboration.
Evernote.com: Very popular application. Syncs across platforms and devices.
IBM.com/analytics/watson-analytics/: East to use the service. Limit on file size and storage.
Project and Task Management:
Zoho.com/projects: Extensive features with Google Apps and Dropbox integration.
Asana.com: Good for team management on simple projects.
Trello.com: Project management tool that makes collaboration easy.
Waveapps.com: Here you'll find all the core accounting functions that a small business needs.
Other Business Services:
Hootsuite.com: Manage and track up to 3 social media profiles. Very popular
GingerSoftware.com: Contextual grammar and spell checker.
Ifttt.com: ifttt stands for If This, Then That. Build connections on the Web.
Skype.com: Text, video and voice communication over the internet.