There are many options.

If you are developing a slide show we recommend Microsoft Power Point (Windows) or Keynote (Mac). Keynote is free for macc users, Power Point is not free. A free alternative is Presentation Free.

For recording your lectures you will need software which will record both your voice and your computer screen (which shows your slides). The best software is Camtasia, bit it is not free. A free alternative is Webinaria.

These two programs are the only pieces of siftware you will require. We will gladly assist you and provide technical help with these programs if you need it.