How to stop launching programs from startup

[Chenxiong Qi <qcxhome gmail com>]

Hi,

I recently noticed that there are a few programs launched
automatically that I don't use anymore or I don't want to use it so
far at least, such as gnome-software and evolution-calendar-factory. I
tried to closed them from tweak tools, but Statup Application does not
list all the programs except VMware User Agent (I actually don't know
which packages installed it). So, how can I configure startup
application to prevent some programs from startup when launching
gnome-shell? Thanks.

-- 
Regards,
Chenxiong Qi