It seems that Kickstarter calls Open Source "Open Software".
How can I follow only these Open Software projects? I don't wish to invest in anything Closed Source.
You can track open source projects by visiting the open source tag: http://www.kickstarter.com/discover/tags/open-source?ref=sidebar#p1
However, tracking via RSS does not work, at least not in Google Reader. There are RSS feed only for all projects or individual projects (see this link: http://www.kickstarter.com/help/faq/backer%20questions#ProfSett):
The notification settings in your account don't allow any specific tracking either:
You may be able to set up tracking changes with a software like Website Watcher. You can test in a 30-day trial if it works for you.
Apart from that, either wait & see or send a suggestion to the Kickstarter team.
You can track all new "Open Software" projects here:
There's no RSS option but you could can get the results emailed Daily or Weekly. Although if you want them Weekly I suggest using this list instead (since it shows all new projects over 7 days instead of 4 days in the browse list)
Hope that helps
You can now subscribe to an RSS feed of all the results