I'm looking for a free app for Mac, similar to Alfred, which will allow me to quickly launch a search to a search engine of my choice from any app by pressing a keyboard shortcut.
Alfred nearly fits the bill, but (a) has a lot of features I don't use, and (b) [most importantly] doesn't allow me to change the default search engine from Google. With Alfred, you need to buy a licence to search with anything other than Google. You can specify 'keywords' to search other search engines (e.g. I can hit Ctrl+Space and then type w example to search Wikipedia for 'example'.
I use DuckDuckGo for all normal web searches, and yes, I could just setup a keyword in Alfred such as d example to achieve the same thing, but this is the SuperUser forum, and as such I'd like to be able to find a solution that allows me to bypass the 'd-space' key combination if possible.