My Android apps of choice, many of which are cross-platform services.

NoteTaking

• Simplenote (text)
• Squid (handwritten)
• S-Note (quick memos)

Twitter

• Twitpane
• Tweecha
• Gravity (yes, the old Nokia Twitter app on Android!)

Coordinating/Planning/Organizing

• Todoist
• Listonic (shared/synced shopping lists)
• Pocket (read later/archive)
• Sync (Canadian cloud storage, shared folders)
• Google Sheets (shared data)
• Mobile Doc Scanner

Photography

• Google Photos
• F-Stop Gallery - powerhouse photo gallery app for viewing/organizing with tags, ratings etc.
• Piktures - another beautiful gallery app
• pFolio (for Google Photos; dev has other apps for other services)
• Zonerama Web Albums / Zoner Photo Studio app for unlimited, online photo albums
• Rename Photos and Videos
• Lyn (Mac OS photo organizer/viewer/Picasa replacement that interacts with your file system - does not create a separate database or hide your photo files)

Birding

• Audubon
• eBird
• Merlin
• iNaturalist
• GoBird

Travel

• TripIt
• TripAdvisor

Website Management

• Forestry - static site CMS that syncs/commits a Jekyll blog
• MrHyde - Jekyll blogging on Android
• StatCounter

VPN

• TunnelBear
• CyberGhost
• NordVPN