I am looking for an alternative to Basecamp, which would you recommend out of the following:
check out "Forecast" (http://getforecastapp.com/)..really cool, simple interface & very easy to use.
Check out http://www.teamlab.com - one of the best alternatives to Basecamp with wider functionality and 2 deployment solutions: SaaS and Server.
check http://www.forecast.pm...this app is really cool & user friendly
Use "Forecast". This app is better
I would certainly recommend Zoho Projects, simple interface and look and feel like MS Project. Also Zoho is a very well-known and established cloud apps player with a plethora of offerings which tightly integrate (eg. ZohoMail) and also integrating with GApps.
Not to forget the 99.9% uptime SLA and 256-bit SSL encryption, important things to consider.
Also do check out https://www.smartsheet.com/ . Pretty simple and robust.