What Buddhist Software is there?

I'm a programmer who is also interested in Buddhism and right now I'm in the planning stage for creating software inspired by Buddhism. I would like to know what Buddhism-related (or -inspired) software is already out there (including simple web apps, mobile apps, etc.) since this can help me with my own project. I'd be grateful if the community can answer this and hope that many others will benefit from software helping to put the teachings into practice. Kind Regards