Printing non-cited software in separate bibliography

Question

Unfortunately I can't find quite a solution, hence this post. I need to print a separate "References" section for software used in the article. This software obviously isn't cited anywhere in the text. I am using TexShop, biber as a backend connected to Zotero with better-bibtex. The software (for example RStudio) can be either in my Zotero library or in a separate bib-file. In the first bibliography, only software should be printed (for example with category={software}); in the second bibliography any works cited in the text should be printed. I did not quite manage to do this yet, so I am happy for some help. Thank you!

Text from my preamble, indicating what I am working with:

\usepackage[
    style=chicago-authordate,
    backref=false,
    hyperref=true,
    backend=biber
    ]
    {biblatex}
    \renewcommand{\postnotedelim}{\addcolon\space} 
%replace the comma with a colon
    \usepackage{bibentry}
    \addbibresource[location=remote]{http://localhost:23119/better-bibtex/library?/1/library.biblatex} 
%Dynamic pull request with zotero; this is the link to the whole library

    \usepackage{filecontents}
    \begin{filecontents}{files/software.biblatex}
        @Manual{,
            title = {RStudio: Integrated Development Environment for R, v1.1.463},
            author = {{RStudio Team}},
            organization = {RStudio, Inc.},
            address = {Boston, MA},
            year = {2016},
            url = {http://www.rstudio.com/},
            keywords = {software},
            category = {software},
      }
    \end{filecontents}
    \addbibresource{files/software.biblatex}

Then, I should print two bibliographies:

\addcontentsline{toc}{section}{Data Sources}\label{DataSources}
\printbibliography[category=software]
\addcontentsline{toc}{section}{References}
\printbibliography

EDIT: I tried to strip everything that is not need to get to a minimal working example, using two sources, where one should be listed in the reference section, the other should be listed in the data sources section.

%----------------------------------------------------------------------------------------
% INSTRUCTIONS FOR ARARA
% arara: lualatex
% arara: biber
% arara: lualatex
%----------------------------------------------------------------------------------------

\documentclass{article}
\usepackage[utf8]{inputenc}

\title{MWE}

%----------------------------------------------------------------------------------------
%   OPTIONS FOR BIBER
\usepackage[
    style=chicago-authordate,
    backref=false,
    hyperref=true,
    backend=biber
    ]
    {biblatex}    

\usepackage{filecontents}
\begin{filecontents}{sources.bib}
@software{rstudio,
    title = {RStudio: Integrated Development Environment for R},
    author = {{RStudio Team}},  
    organization = {RStudio, Inc.},
    address = {Boston, MA},
    year = {2016},
    url = {http://www.rstudio.com/},
    version = {1.1.463},
    keyword = {software},
    }

@article{ullmann2010bit,
  title={Bit-vector algorithms for binary constraint satisfaction and subgraph isomorphism},
  author={Ullmann, Julian R},
  journal={Journal of Experimental Algorithmics (JEA)},
  volume={15},
  pages={1--6},
  year={2010},
  publisher={ACM},
}
\end{filecontents}

\usepackage{bibentry}
\addbibresource{sources.bib}

\begin{document}
This is a reference that should show up in the Reference section: \parencite[5]{ullmann2010bit}\\
I used RStudio; details can be found in the Data Sources section.

\addcontentsline{toc}{section}{Data Sources}
\printbibliography[keyword={software},title={Data Sources}]

\addcontentsline{toc}{section}{References}
\printbibliography[notkeyword={software}]

\end{document}

EDIT2: I could also try to solve the problem by generating a bibliography in the desired format in Zotero (output as RTF or HTML) and then embed the HTML or RTF file in the desired section, where my software should show up (it is only going to be a handful or data sources, so exporting them manually from Zotero is feasible). I am using the LuaLaTex engine, if that helps with this (due to 'fontspec').

Answer 1

Here is one possible take at it. We employ the usual \nocite{*} to add all entries present in the bib file(s) to the bibliography, but then, we add all entries which are actually cited to the category cited. That should be enough, alongside the keywords={software}, to properly screen each of your bibliographies.

Note that I removed a couple of packages you loaded, with comments as to why. I've also fallen back to entrytype misc for your software entry, because biblatex-chicago threw me an error for it ("I can't find a driver for the entry type 'software' and there is no fallback driver either.").

\documentclass{article}

% you shouldn’t need this with lualatex...
% \usepackage[utf8]{inputenc}

\title{MWE}

\usepackage[
    style=chicago-authordate,
    backref=false,
    hyperref=true,
    backend=biber
    ]
    {biblatex}

\usepackage{filecontents}
\begin{filecontents}{sources.bib}
@misc{rstudio,
  title = {RStudio: Integrated Development Environment for R},
  author = {{RStudio Team}},
  organization = {RStudio, Inc.},
  address = {Boston, MA},
  year = {2016},
  url = {http://www.rstudio.com/},
  version = {1.1.463},
  keywords = {software},
}

@article{ullmann2010bit,
  title={Bit-vector algorithms for binary constraint satisfaction and subgraph isomorphism},
  author={Ullmann, Julian R},
  journal={Journal of Experimental Algorithmics (JEA)},
  volume={15},
  pages={1--6},
  year={2010},
  publisher={ACM},
}
\end{filecontents}

% no need with biblatex, and possibly incompatible with it, use \fullcite instead
% \usepackage{bibentry}

\addbibresource{sources.bib}

\DeclareBibliographyCategory{cited}
\AtEveryCitekey{\addtocategory{cited}{\thefield{entrykey}}}

\begin{document}
This is a reference that should show up in the Reference section: \parencite[5]{ullmann2010bit}\\
I used RStudio; details can be found in the Data Sources section.

\nocite{*}

% \addcontentsline{toc}{section}{Data Sources} % better use printbibliography’s options for that
\printbibliography[heading=subbibintoc,keyword={software},title={Data Sources}]

% \addcontentsline{toc}{section}{References}
\printbibliography[heading=subbibintoc,category=cited,notkeyword={software}]

\end{document}