This is going to sound odd but I'd recommend journaling. You need to spend some time free writing to access your subconscious and gain insight into how you really feel and especially what you value. You'll be amazed at how effective it is. I'm of the opinion that a substantial share of ennui arises from a failure to commit to routine and honest introspection.
With respect to software, your feelings may stem from a perceived deficit in value creation. No matter what we do, we all want to feel like we're contributing in some way and we all try to find ways to achieve that. Could be blogging, OSS dev, teaching classes, turning an app into a business (or just putting it out there for people to use freely!), etc. If you're just hacking on things to learn, that's great and necessary. But you might be better served taking it a step further.