Are there any professional services ERP vendors that focus on resource planning, time tracking, and project accounting?

Yes. There’s a whole category called Professional Services Automation (PSA) / services ERP vendors that focus on exactly that mix: resource planning, time tracking, project accounting, billing, utilization, and profitability.

A few well-known vendors in this space:

• Kantata — strong in resource management, project accounting, and time/expense tracking for services firms.
• Deltek Vantagepoint — popular with consulting, AEC, and other project-based professional services organizations.
• NetSuite OpenAir — good for time tracking, project management, resource management, and project financials.
• Certinia (formerly FinancialForce) — built on Salesforce, with strong project accounting and services delivery capabilities.
• Accelo — aimed at agencies and consultancies; covers projects, time tracking, billing, and resourcing.
• Projectworks — focused on services businesses needing resource planning, time sheets, and project financials.
• Birdview PSA — resource planning and project/financial management for services teams.
• SAP S/4HANA / SAP Business ByDesign with services add-ons — broader ERP, but can support project-based services operations.
• Microsoft Dynamics 365 with PSA/partner extensions — often used with add-ons for resource planning and project accounting.
• Autotask PSA — especially common in MSPs and IT services, with time tracking and project/service management.

If you want, I can also give you:

1. a shortlist by company size (small/mid-market/enterprise), or
2. a comparison table focused specifically on resource planning, time tracking, and project accounting.