I presented at the Lucene/Solr Revolution 2014 in November, comparing Solr and Elasticsearch. The target audience was a technical person who wants to understand how similar (mostly Lucene) concepts are expressed in these two products.
The presentation was only 30 minutes, so I could go into the subject as deep as I initially hoped. But the room was more than full and people came up to me afterwards saying that they really liked the comparison and found it helpful.
Leanpub is a platform for publishing books that gives author control and tools beyond those available from traditional publishers. I used it to test an idea for a Solr Clients book and was able to validate its lack of traction without spending a cent.
One of the great features of Leanpub is that a book can be updated and the readers get notified of the new version. Consequently, it is sometime useful to keep the old versions around for the author and sometimes even for the readers.
This feature is not currently present in Leanpub, but we can add that with a bit of a glue from Zapier – web automation service. This is especially useful if you are using GitHub to edit your book with automatic preview and want a full end-to-end edit-preview experience without having to touch the Leanpub website.
Javadoc is default – and often only – documentation for open source Java projects. It is generated automatically and can just be dumped on any public-facing server as a bunch of static files. Or even bundled with the distribution, if size is not an issue.