I have mentioned Sharesight a few times but I don't think it has its own thread.
Its free for less than 10 holdings and after that costs depending on how many portfolios you want and whether you want FIF reporting.
I find it a huge timesaver (compared to my old excel files) and links directly with Xero for quick accounts (they offer Xero cashbook for $15pm which is normally only avaliable through an accountant).
Trades automatically upload from your broker statements and dividends automatically load up once declared. It is almost set and foreget as far as admin goes but reporting is great to see how you are doing.
Highly recommended
http://www.sharesight.co.nz/
Disc: not associated in any way other than a happy user.