All the usual suspects plus:
LLBLGENPro for all data-access. Couldn't live with out it. Support is excellent. Normally within a few hours. Forum monitored by lead developers and users very smart. Documentation, excellent but a little dry.
PeterBlum Validation and More for validation. A lot more comprehensive than MS admittedly poor offering. Support is very good. Normally the same day. Mailing list constantly monitored by lead developer, mail users a real mix bag. Documentation. Exceptional - Almost too much of it!
Telerik Rad Control Suite. A good suite of GUI controls. Sometimes these controls frustrate me but they are mostly solid. Support is good. Normally the same day but can require chasing up. Forums monitored by support and developers. Forum users a mixed bag but a lot of helpful members. Documentation excellant - a 500 page book infact.
Cheers,
Peter