tab32

tab32 is cloud-based dental practice management software with Alpine for solo and small practices and Summit for groups: scheduling, charting, imaging, claims and analytics in a browser. Shareware (conditionally free): free trial and demo; no free edition.
Denticon
Denticon is Planet DDS’s cloud-based dental practice management software for US DSOs, groups and practices: scheduling, charting, AI voice perio, eClaims and analytics in Chrome or Edge on Windows. Shareware (conditionally free): commercial software with a demo; no free version.
Care2x

Care2x is a free, open-source (GPL) web-based hospital information system for admissions, wards, outpatients, lab, pharmacy and surgery. The last stable release is from 2012, with PHP 8 work on GitHub since. There is no dental fork or dental module.
OpenClinic GA

OpenClinic GA is a free, open-source hospital information system covering admissions, billing, lab, X-ray, pharmacy and reporting in a browser. It runs on a Windows or Linux server. It has no dental module; dental departments use its general functions.
Dentally

Dentally is cloud-based dental practice management software from Henry Schein One for the UK, Ireland, Canada, Australia and New Zealand, with NHS integration and CDAnet claims. Shareware (conditionally free): commercial, with a demo and a training Sandbox for new customers.
ClearDent

ClearDent is all-in-one dental practice management software for Canadian offices: scheduling, charting, treatment planning, billing, CDAnet claims and imaging, as Cloud, On-Premise or hybrid Link. Shareware (conditionally free): commercial, with a free demo. There is no Lite edition.
Curve Dental

Curve Dental is cloud-based dental practice management software for US and Canadian practices: charting, scheduling, billing, insurance and imaging in Chrome on Windows or Mac, with no office server. Shareware (conditionally free): commercial software with a demo; no free version.