Also, if you are into scripting, Bioclipse is also a good choice as it also supports the QSAR-ML markup language:
http://www.biomedcentral.com/1471-2105/8/59
The Toropov group also have a SMILES-based QSAR tool called CORAL:
http://www.insilico.eu/coral/
You may also want to have a look at http://www.vcclab.org/ as there are several tools you may use in your QSAR project such as computing descriptors with E-DRAGON, reduce redundant variables with UFS, as well as build QSAR model with PLS or ASNN.
If an academic (with a fix position) or a researcher in Res Center wish a free licence of QSARINS, he/she could ask me in my web: http://www.qsar.it, answering to some questions to understand your experience in QSAR modeling.
Alvascience provides free tools for academia, alvaMolecule and alvaRunner. alvaDesc and alvaModel are provided at a special price to foster and support academic research. More info here: https://bit.ly/34RHqTZ
EasyQSAR is a free and beginners tool for QSAR in Drug Designing. You can find the tutorial and download link here: http://easyqsar.blogspot.com/2009/09/easyqsar-beginners-tool-for-qsar-in.html
Here are some free online tools for quantitative structure-activity relationship (QSAR) study of lead compounds:
QSAR Toolbox This is a user-friendly platform that provides a variety of tools for QSAR modeling, including descriptor generation, data curation, model building, and validation.
ChemBench ChemBench is a comprehensive suite of tools for cheminformatics and QSAR modeling. It includes tools for data cleaning, descriptor generation, model building, and visualization.
PaDEL-Descriptor This is a free and open-source software that calculates a wide range of molecular descriptors for QSAR studies. It can be used as a standalone tool or integrated with other software packages.
VCCLab The Virtual Computational Chemistry Laboratory (VCCLab) is a collection of free online tools for cheminformatics and QSAR modeling. It includes tools for descriptor generation, fingerprint calculation, similarity searching, and model building.
OBELINX OBELINX is a free web-based platform for cheminformatics and drug discovery. It includes tools for QSAR modeling, virtual screening, and ADME/Tox prediction.