Born Open Access

Language Science Press is a born-digital scholar-led open access publisher in linguistics so a good example of what can be achieved. 

Read their collaborative 'Cookbook'

The book is available for collaborative reading at  Readers can directly annotate the text there, raise questions, make comments or share personal experiences. Source code is also freely available. It doesn't claim to be written by experts but is complemented by the business model, open business data, and a spreadsheet for drafting and calculating own business models. 

Online guide supporting and giving guidance to new university presses and library-led publishing ventures. It is a trusted and valued resource, although it is at the start of a process to archive it to a new platform (no timeline yet available). 

See: https://www.jisc.ac.uk/guides/new-university-press-toolkit

The Open Book Collective toolkit is for small, scholar-led OA publishers who are either setting up a press or seeking to improve its operations. It covers a broad range of aspects about setting up a press and building one up logistically and reputationally. It also provides case studies. It and the Jisc NUP toolkit are complimentary. 

See: https://toolkit.openbookcollective.org/

A publication service finder for editorial managers, editors and authors at any stage of a publication project. Useful resource as caters for different stakeholder groups; currently in beta so not fully developed but hosted by Operas so watch this space… 

See: https://pathfinder.operas-eu.org/