Ohh, BBEdit. I've long since moved on from the Mac platform, but I
still have really fond memories of it and wish more text editors could match it (SublimeText is pretty good too).
I remember when BBEdit came out. It was revolutionary at the time. It was a fun challenge to find "large" files to test it on, and for a while nobody was sure how it did the magic it did.
It shipped with a really clean UI and it gave me my introduction to regular expressions. Its "light" theme is still so good that I occasionally try to clone it into environments (unsuccessfully).
When Mac development shifted from the THINK ecosystem over towards Metrowerks, CodeWarrior's IDE was such a pig that you'd figure out how to do the editing in BBEdit and the debugging and compiling in MWCW.
BBEdit also shipped with a rare (again, at the time) ability to open and juggle loooooots of windows, and with a little bit of Applescript we'd try to open an entire directory of files just to see if we could make it faceplant. It almost never did.
I have a huge amount of respect for Rich and having stuck to doing one thing and one thing well for so long. (Well, kinda. TextWrangler was okay, and MailSmith was pretty good but got sold.)