Bitrix24 - Bitrix24 is a free (for small businesses) social enterprise platform. It is a united work space which handles the many aspects of daily operations and tasks. Create your own social intranet in minutes!
NeverBounce - Real-time email verification and cleaning to ensure emails never bounce.
VOGSY - Professional service automation tool built on Google G Suite
Email List Verify - The Fastest Way to Improve Email List Deliverability and ROI
Office Timesheets - Professional Services Automation
DeBounce - Email Validation, Email Checker, Data Enrichment and Appending Tool. Using DeBounce remove invalid, disposable, spam-trap, syntax and deactivated emails.