Gizmo App works really well as a project management solution for digital agencies: https://www.gizmo.cool/ https://www.gizmo.cool/ It has invoicing and billing

Gizmo App works really well as a project management solution for digital agencies: https://www.gizmo.cool/ https://www.gizmo.cool/ It has invoicing and billing built in, which really solves a major pain point for most agencies.