[onechik]

Chrome

Google drive (a lot of stuff was done in it)

Google keep (really, I've deleted evernote as I like simple in use tools)

Pocket (not to forget a lot of helpful links)

Gmail

Buzzsumo (great tool but I've learned about lately. All stuff was done before)

Webflow (to create landing page)

Adobe Illustrator (to make all design)

It seems that my list is too short. But I think that you have to concentrate on your startup idea and not the searching of 'right' tools. If you really need them you can read here: http://www.quora.com/Startup-Founders-and-Entrepreneurs/What...