Productive.io is a suite of tools to help businesses increase productivity like project management, time tracking tools.

Bitrix24 is a free (for small businesses) social enterprise platform.

TimeCamp is an advanced time-tracking app which also offers a variety of reporting, billing, and invoicing features.

taskblitz is set of tools to collaboratively get your work done including project management, chat, time tracking and invoicing.

Avaza is a beautiful online software suite with modules for Project Management, Timesheets, Expenses & Invoicing. Access from anywhere, with any device.

PandaDoc is a document automation platform with support for digital signatures.

Xero is an accounting software to manage invoicing, bank reconciliation, bookkeeping & more.

Firmao CRM is a business software includes modules like online crm (customer relationship management), projects and tasks management, invoicing and many more.