I recently found this application (New developer tool: PodPro) for a pod browser to be really useful and a better alternative to the traditional pod browser to the standard one for solidcommunity.net pods.
In terms of an applications, there’s really no shortage of applications to be found at Solid Applications · Solid, many of which have been recently released or are still being developed. I’m currently developing a Solid application for storing and accessing healthcare records and will post more about it here in a month or so when it is in a presentable state.