[vram22]

As others have said in this thread, reveal.js is good. I've used it via slides.com where I put an overview presentation about my xtopdf Python toolkit for PDF generation from other formats:

http://slides.com/vasudevram/xtopdf

S5 by Eric Meyer is good too - web-based, uses HTML, CSS and JavaScript:

https://meyerweb.com/eric/tools/s5/

Online S5 intro / demo using S5 itself:

https://meyerweb.com/eric/tools/s5/s5-intro.html

Edit:

Sorry, missed seeing your requirements for the tool, not sure if S5 has them, but leaving my comment up since I think S5 is interesting and definitely a presentation tool.