
Description: Sleek Bill is an intuitive, easy-to-use invoicing and billing software for freelancers and small businesses. It allows creating professional-looking invoices, estimates and receipts in just a few clicks.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: timeBuzzer is an open-source time tracking and productivity software. It allows users to track time spent on projects and tasks, set budgets, record expenses, generate reports and invoices. Great for freelancers, agencies, and teams.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API