For the social stuff, BrandWatch are my go-to. Good people, good product, good data. For last year's conference in SF, we got sentiment analysis, gender breakdown, tweet locations, and a full count of social reach - all 17.5million impressions on #mtpcon. Love those guys.
On the attendee side, we tend to go with TypeForm for a post-event survey, including the all important NPS question (we're getting near 70, haven't broken through yet... but beating Apple feels good!).
For the other bits you mention, GDocs or Excel - nothing more complicated.