Arrow is a planning tool that I have created for myself, in 2015. Currently it is available for free, for everyone.

The interesting thing about Arrow is that the server is written in C. I have extracted the web server code from the Photostovis project and I created a library with it. This library makes the base of the Arrow web server. The initial idea was that Arrow runs on the same very limited server hardware as Photostovis, so this is why this rather strange choice. Today I would use Node.js as server technology.

More (non-technical) details about Arrow can be found in this blog post.