Overleaf is a web based online (collaborative) LaTeX solution. The standard service is free to use, although one can pay a monthly subscription to get access to additional features (e.g. more than 1 collaborator per document, Dropbox or Git file sync, tracked changes and versioning). As of October 2020 department members with @maths.ox.ac.uk email accounts (i.e. staff and Dphil students) now have access to the licensed features covered by a departmental license (shared with Computer Science).
Being web based you just need a computer with modern web browser, no need to install LaTeX packages, editors etc.
Text Editors for use with LaTeX
- TeXmaker - cross platform latex editor
- TeXworks - cross platform latex editor
- Kile - latex editor originally developed for KDE Linux desktop environment
- GNU Emacs editor - a common editor on Linux systems with a comprehensive LaTeX mode. There is a version of Emacs available for Windows too.
For a postscript printing/viewing package for windows see GSView.