Overleaf - The online platform for scientific writing. Overleaf is free: start writing now with one click. No sign-up required. Great on your iPad.
Sitecake - Drag and drop CMS for HTML websites. It's flat file CMS so it's pretty fast.
TeXworks - The TeXworks project is an effort to build a simple TeX front-end program (working environment)...
Anchor CMS - Free and lightweight blogging system
Texmaker - Texmaker, free cross-platform latex editor
Textpattern - Textpattern is an elegant content management system that is free, open source software.