Are these products worthy?

Hey Hackers,

I'm trying to validate if any of these ideas are worthy to work on. I just got laid off and I want to spend the next couple months creating something.

1. MailMeThatBlog - I get a lot of value from reading blogs from others creators/marketers etc. But sometimes I wish I had a paper version of the text as my eyes get tired of reading from a screen. MailMeThatBlog sends you the print version of your favorite blogs, to your physical mailbox!

2. Google Docs Comments Organizer - If you've ever used GDocs at a big company you know how messy google doc comments can get. Its too much to deal with if you're the author. This product provides a slack like interface for google comments to make it easy for everyone to track conversations on a doc.

3. Idea Validator - Its hard to get good data on whether a product is needed or not. Sometimes DM's people on Twitter and cold calling doesn't work. This service is a marketplace connecting new founders to their ideal audience where the new founders can pay to get on a call with their target audience.

4. Easy CMS - An apple notes / evernote style desktop app that lets you push content straight to your blog. Removing the friction of deploying your content or writing in an online editor.

Please reply with Idea no and what you think about it.
For eg -

1, This idea works (or not) because......

Thanks!
@singhuler