Best Language Learning Software?
There is no "best" language learning software.
Linguistic needs and motivations vary widely. A wide variety of high-quality resources, tools and exposure empowers language learners to be successful in their goals.
Exposure alone to these tools is not the whole picture. There's a motivation, some kind of reason, behind the effort required to truly achieve. This is where you'll find the reason to keep it up, stay learning and move toward personal language goals.
Much also depends on what language you are learning and how you learn best.
These are part of the factors that make up your personal language profile. If you learn about yourself a little, you can know exactly which resources will be most helpful in your individual case.