Ωnyx: A graphical interface for Structural Equation Modeling. Ωnyx is a free software environment for Structural Equation Modeling. It runs on a wide variety of platforms, including UNIX, Mac, and Windows. Ωnyx is available free of charge. http://onyx.brandmaier.de/
Lavaan: R is transforming quantitative analysis. http://lavaan.ugent.be/tutorial/sem.html
Amos: Amos is a popular package with those getting started with SEM. Start learning SEM using the free student version of Amos simply because it is such a good teaching tool. AMOS is statistical software and it stands for analysis of a moment structures. AMOS is an added SPSS module, and is specially used for Structural Equation Modeling, path analysis, and confirmatory factor analysis. It is also known as analysis of covariance or causal modeling software. AMOS is a visual program for structural equation modeling (SEM). In AMOS, we can draw models graphically using simple drawing tools. AMOS quickly performs the computations for SEM and displays the results. https://www.statisticssolutions.com/amos/
LISREL: During the last forty five years, the LISREL model, methods and software have become synonymous with structural equation modeling (SEM). SEM allows researchers in the social sciences, management sciences, behavioral sciences, biological sciences, educational sciences and other fields to empirically assess their theories. These theories are usually formulated as theoretical models for observed and latent (unobservable) variables. If data are collected for the observed variables of the theoretical model, the LISREL program can be used to fit the model to the data. http://www.ssicentral.com/index.php/product/lisrel
EQS: EQS for Windows is one of the most widely used Structural Equation Modeling programs, known for its ease of use and powerful features. EQS offers upgrades to current users at a discounted price. Updates within a version are provided to licensed user's free of charge. http://www.mvsoft.com/products.htm