We are excited to announce the beta release of OpenSim 4.4 and we would love to have your help in testing the new software! We would appreciate getting input by June 30. The OpenSim 4.4 beta has many improvements and bug fixes that we are excited to get into your hands. OpenSim 4.4 debuts Moco enhancements to define optimization goals, as well as Conda packaging for easy access to OpenSim functionality in Python. A more detailed list of what’s new can be found here <https://simtk-confluence.stanford.edu:8443/pages/viewpage.action?pageId=83468789> . We are looking for testers, whether you have time to test one thing or ten. To get started, install the OpenSim 4.4 Beta <https://simtk.org/frs/?group_id=91> (scroll down to "OpenSim Beta Releases") and visit the shared testing doc <https://docs.google.com/spreadsheets/d/1PG4qHz6FvABBIF2XpACUqwZXXRg8KwfKSJxw4djepAM/edit?usp=sharing> for instructions and a list of tasks to test. You can test out the bug fixes, try out the new features, or run through an example or two. Please don't hesitate to send any questions or feedback via email as well. Thanks in advance for your help! - The OpenSim Team -- *Jennifer Hicks, PhD* Deputy Director Wu Tsai Human Performance Alliance at Stanford <http://humanperformance.stanford.edu/> OpenSim Project <http://opensim.stanford.edu/> | Mobilize Center <http://mobilize.stanford.edu/> | Restore Center <http://restore.stanford.edu/> Stanford University | Contact & Bio <https://profiles.stanford.edu/jennifer-hicks>