As for fear, the ones I can think of off the top of my head:
- remove fear (surpresses existing fear for 10 min, +4 bonus to new fear saves)
- heroes' feast (12 hour fear immunity)
- mind blank (pretty sure fear is mind-affecting, 24 hr duration)
There are some feats/PrC abilities that give protection to certain types of fear (dragon fear, for example). Heroes of Horror has a lot on this. Dread witch is a PrC that is all about fear, even to those immune to it! I'll take a gander at it when I get home from work.
For blindsight:
- high level dungeondelvers get it a limited number of times per day (or is that blindsense?)
- shapechange into a grimlock
- their's a wild feat (I forget the name) that let's druids expend a wild shape to get blindsight
- Combat Awareness - you need three combat presense (? from PH II) feats to get the blindsight though and it's only 5'