We use XERO in our startup and it works well as an accounting package doing what it sounds like you require.

I would include the source always. Crunchbase, wikipedia is always a good source but be aware. Slideshare is a great tool for this. Always cite source.

Try Moz - they seem good. Hubspot.

Michael is right, "Venture Deals" (second edition) by Brad Feld is by far the best book and includes a sample term sheet. It is less about angel investment but they do cover convertible notes. http://blog.ycombinator.com/announcing-the-safe-a-replacement-for-convertible-notes This is an alternative to the CN. Also, here is a link to some startup books. http://www.businessinsider.com/read-these-books-before-pitching-vcs-2013-8?op=1&IR=T

If you haven't read Lean Startup, read that before pursuing any investment. Hold on and bootstrap as long as you can is my advice.