Our department produced two software for analysis hyman and griffing. both of them are perfect but they need an old version of windows to work. Si if you have xp windows, it will work perfectly. the computer should be connected with printer. The results will be in print out
You can try QGAStation to estimate heterosis and other genetics parameters.
http://ibi.zju.edu.cn/software/qga/index.htm
This software has several features: Handle complicated genetic models for agronomic traits, seed traits, and developmental traits; Analyze unbalanced data; Combine jackknifing techniques to test the significance of each genetic parameter; Some important references are listed in the result files.
GENES is a software package used for data analysis and processing with different biometric models and is essential in genetic studies applied to plant and animal breeding. It allows parameter estimation to analyze biological phenomena and is fundamental for the decision-making process and predictions of success and viability of selection strategies. The program can be downloaded from the Internet (http://www.ufv.br/dbg/genes/genes.htm or http://www.ufv.br/dbg/biodata.htm) and is available in Portuguese, English and Spanish. Specific literature (http://www.livraria.ufv.br/) and a set of sample files are also provided, making GENES easy to use.
you can also visit this website: http://lbm.ab.a.u-tokyo.ac.jp/~ukai/dial98.html
I would like to add another option with the above suggestions is R. There are some packages which deals with diallel analysis ('agricolae', 'plantbreeding' etc) in R platform.
PBTools didn't have option to analysis Hayman' approach and it's just have Griffing approach. But, AGD-R is another media to perform analysis of both approaches. As I noticed, its is best optimized for hayman approaches but not for Griffing. Because it did't give us all genetic parameters. If AGD-R calculate all genetic parameters in 4 methods and four models in each method, it will be the best software in this field.
You coudl try BAFR web app. Currently it is in Turkish language. But there is no need to know Turkish for using it. You could find the user manual in the attached.