This is my take on the “must have” list of iPhone apps.
MobileNoter: idea capture, reference lookup for my GTD process based on MS OneNote*
HT Professional Recorder: voice capture … phantastic results even in big meetings / larger distance.
JotNot: whiteboard / paper capture (automatic image processing and PDF, PNG output).
Tumblr.
Mindjet: mobile lookup / manipulation of my key mind maps.
GoodReader: … tried probably 5+ PDF apps. This is the best by a long shot (large files, bookmarks, various sync / transfer options & text view).
Docs2Go with Exchange support: allows reading and manipulation (!) of DOC, XLS and PPT. Exchange interface works with Google Mobile (Gmail).
iExplorer: MS Live Mesh support and can display CHM files among many others.
Japan Transit: GPS enabled transit lookup / route planing for train / metro in Japan.
JAtranslate: hooks into Infoseeks translation engine (beats the crap out of Google translate as far as Japanese is involved).
Google Maps.
NewsRack: syncs with Google Reader, offline reading.
Skype.
ReMail: insanely fast and complete full text search over your IMAP mailboxes (iPhone OS spotlight does only header data).
IM+: Skype, AIM, MSN, GTalk / Jabber, Yahoo, Twitter, Facebook IM … Stays logged in up to 3 days + push notifications.
Facebook.
Pocket Informant: Google Calendar and Toodledo with push notification. Full featured, professional UI (iCal falls short on multiple levels).
Bing: better UI, partly better results then Google app.
*the killer app that prevents me from going “all Mac”.
