Are software-recommendation questions on topic?
Software recommendation questions can provide a good reference for people looking for software for certain situations. They will take a lot of moderating to prevent them getting subjective.
Other SE sites
Some other SE sites have software-recommendation
The tag will stay, unless it becomes a problem.
software that runs on the Raspberry Pi
According to our faq any question about software that runs on the Raspberry Pi is on-topic. This means that recommendations about software is on-topic, for now.
Currently all of the questions tagged software-recommendation are of high enough quality. As long as this tag doesn't become a cesspit then it will be allowed to say.