Altavista. I miss it every single day. Searching for technical (unix, programming, etc.) content is so much easier when you can use nested parens and proper boolean language. This is in contrast to google where searches return things that don't even contain your keywords. This is in contrast to google where the modifiers like allinsite: and '+' and "quotes" are not respected or change their behavior over time. Man I…
This has become so frustrating as of late, especially when you search for something like "c++ map" and it decides to completely ignore the "c++" part of your search, leaving you with pages of actual maps. Slightly exaggerated example since I can't remember any concrete ones off the top of my head, but the actual situation happens way too often.