What software do you use for project management/task management?

First I used Trello but then discovered thesecretweapon.org (which is basically Evernote). Never looked back since.

James2 said:

Evernote.

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I use Evernote too.
I'm using Basecamp for collaboration and Time Doctor for time tracking.
However, there could be more options to Basecamp but I like its mind-bending simplicity.

I've researched for more project management software that we can use 'daily' so here are some of them, http://blog.timedoctor.com/2011/02/02/43-project-management-software-alternatives

I am using proofhub. It seems to be the best project management software I have ever used. Features like to-do's, time tracking, casper mode, private discussions and gantt chart make it really amazing + it has both free and paid packages.