ToolJet

A low-code builder for internal tools, where a drag-and-drop canvas is wired to your databases and APIs and published as a working application for staff. It ships with connectors for PostgreSQL, MySQL, MongoDB, Snowflake and other engines plus REST, GraphQL and SOAP endpoints, together with tables, charts, forms, kanban boards, JavaScript and Python logic, workflow automation and role-based access control.

Operations, support and finance teams use it for admin panels, approval workflows, ops dashboards and back-office apps rather than waiting on a backlog of small requests.

Deploying it on your own servers keeps query results and connected credentials inside your network, avoids charging per builder or per viewer, and makes the underlying PostgreSQL instance straightforward to back up and restore.