How to set your Energy Saver sleep settings to what you want, rather than what Apple might want you to.
BBEdit
How can I constrain Find and Replace in TextEdit to work on just selected text?
Which is the best text editor to use for OS X configuration files?
Regular Expressions turn search terms into a programming language. Are they just for Unix wizards?
Tools to take two (or more) documents, work out the differences between them, reveal those in a manner which allows their review, and allow you to apply selected changes found in one document to the other.
Once acquired, text needs to be structured and formatted. This guides you through different formats and editing options.
In the first of a series, this explains how Macs work with Unicode, how to get the best out of that, and how to fix its problems.
The Eclectic Light Company 