Estonia-based Tuumik Systems developed its self-hosted practice management software for law firms (originally called Perifold). 

Tuumik is a time tracking and team management platform designed for law firms and other professional services organizations that rely on billable time. The system provides tools to monitor work activity, manage workloads, and support billing processes through centralized tracking and reporting. It is offered with both cloud-based and self-hosted deployment options and is built using open technologies, allowing organizations to maintain control over their data and customize the system as needed.

Key Features and Functions include:

• Time Tracking and Activity Monitoring
  Enables users to record time spent on tasks and projects across devices. Provides visibility into individual and team activity to support billing and productivity tracking.
• Workload and Team Management
  Supports oversight of team workloads, including assignment of tasks and monitoring of progress. Allows managers to view activity across teams and identify capacity or bottlenecks.
• Reporting and Analytics
  Provides reporting tools to analyze time usage, productivity, and operational metrics. Supports generation of insights for billing, resource planning, and performance management.
• Billing Support
  Tracks billable time and supports workflows associated with invoicing and financial oversight. Enables firms to link recorded time to client work and billing processes.
• Cloud and Self-Hosted Deployment
  Offers flexibility in deployment, allowing organizations to use a hosted version or deploy the system within their own infrastructure. Supports control over data storage and access.
• Open Technology and Customization
  Built on open technologies with source code available, enabling customization and extension of functionality. Supports organizations that require adaptability and transparency in their systems.
• Cross-Device Accessibility
  Allows users to track time and access system functionality from multiple devices, supporting distributed teams and flexible work environments.