Alternatives to LyX
Document processor that writes LaTeX for you. The listings below can replace it for an important use case. Each note says what changes if you switch.
The original
LyX
Document processor that writes LaTeX for you.
Replacements
Listings that take over the same core job as LyX.
Overleaf
Collaborative LaTeX editor that runs in the browser.
Overleaf edits LaTeX collaboratively in the browser without a local TeX install, but you write LaTeX source, and free accounts limit collaborators and compile time.
Typst
A typesetting system as capable as LaTeX but far easier to learn, with fast incremental compilation and readable error messages.
Typst is an Apache-2.0 typesetting system easier than LaTeX with fast live preview and built-in maths, but its package ecosystem is smaller and syntax is pre-1.0.
LibreOffice
The full free office suite: word processor, spreadsheet, presentations, drawing, database and formula editor.
LibreOffice Writer is a free visual word processor that needs no TeX distribution, but it trades LaTeX typesetting quality for a conventional layout-based editor.
Similar software
Related functionality, not a direct replacement.
TeX Live
The reference cross-platform TeX and LaTeX distribution.
MiKTeX
TeX distribution that installs missing packages on demand.
Pandoc
Converts documents between almost any two markup formats: Markdown, Word, LaTeX, EPUB, HTML, PDF and dozens more.
Quarto
Publish technical documents from Markdown and executable code.
LanguageTool
Grammar, spelling and style checker for more than thirty languages.
JabRef
An open-source reference manager for collecting, organising and citing literature in BibTeX and BibLaTeX.