Marine: Boat & more

Tip: Locus Map supports OpenSeaMap ("nautical variant" of OpenStreetMap). That way you not only have your "on water navigation", but "landmarks" as well! Same can be said for OsmAnd with the Nautical Charts plugin.

Avalon Offshore - Weather, Routing, Navigation (4.8@28; ~EUR 48.00) Ǥ 14
SailGrib Weather Routing Free (4.5@1,444) Ǥ 17 / Weather - Routing - Navigation (4.8@945; ~EUR 70.00) Ǥ 16
Ski Map Plugin — OsmAnd (4.5@726) 0 $Contains no known trackers \o/$ LastUpdate: 2016-12-27
OsmAnd API Demo (4.5@45) 0 $Contains no known trackers \o/$ LastUpdate: 2018-01-12 for developers: test integration with OsmAnd and functioning of the main features
Locus Map Free - Hiking GPS navigation and maps (4.4@40,884) Ǥ 24 / Locus Map Pro - Outdoor GPS navigation and maps (4.6@33,109; ~EUR 10.00) Ǥ 18 Testbericht 12/2012; Vorstellung 11/2013 | 3/2014; Video Tutorials for Beginners 2017; Izzy's Locus Ressourcen-Sammlung; Online & Offline; KML/KMZ/KMX Import (POIs/Routen/Bilder), GeoCaching, ANT+ Support; Ǥ-free version available
PathAway GPS Outdoor Navigator (4.4@287) Ǥ 12 / PathAway LE - Outdoor GPS Nav (3.8@20; ~EUR 6.50) Ǥ 12 / PathAway Express - Outdoor GPS (3.7@45; ~EUR 20.00) Ǥ 12 Video Demo 5/2012; Record tracks, capture points, create and follow routes, navigate with online maps. Intended for aviation, boating, off-road driving, hiking, cycling, touring, Geocaching, …
Boating Marine & Lakes (4.2@10,690) Ǥ 20 / Boating HD Marine & Lakes (4@16,805) Ǥ 15 / Boating Europe (3.9@3,356; ~EUR 43.00) Ǥ 17
WinGPS™ Marine (4.2@882) Ǥ 16
Sailings (4.1@525) Ǥ 8 LastUpdate: 2018-02-17
Maritime World Ports (4.1@344) Ǥ 7 $Contains no known trackers \o/$ LastUpdate: 2016-08-29
qtVlm Navigation and Weather Routing (4.1@144) Ǥ 14
Nautical Charts — OsmAnd (4@1,819) 0 $Contains no known trackers \o/$ LastUpdate: 2016-12-27 Plugin for OsmAnd
Marine Navigator Lite (3.9@1,918) 3 $Contains no known trackers \o/$ LastUpdate: 2016-08-02 / Marine Navigator (3.9@417; ~EUR 8.25) Ǥ 6 LastUpdate: 2018-04-02
MX Mariner - Marine Charts (3.9@634; ~EUR 11.00) Ǥ 12
Boat Beacon - AIS Navigation (3.9@242; ~EUR 14.00) Ǥ 12 Review 5/2012; Intro 8/2012
SEAiq (3.9@7; ~EUR 50.00) 9 / SEAiq Pilot (3.8@17; ~EUR 350.00) 9
OpenCPN (3.8@1,079) 10 LastUpdate: 2016-10-03 / OpenCPN (3.7@268; ~EUR 10.50) 10
KartenWerft NavGo (3.8@107) Ǥ 7 $Contains no known trackers \o/$ Vorstellung 2/2014; Test 2/2014; Karten kostenpflichtig erwerbbar (je ca. 40 Euro, nördliche Hälfte Deutschlands), Nutzung im Offline-Modus (ohne Netz); Navigation, tagesaktuelle RevierInformationen, Push-Meldungen bei wichtigen Ereignissen
AFTrack Sailing Edition (3.8@58) 15 $Contains no known trackers \o/$
SeaWi Marine (3.7@143) Ǥ 12 $Contains no known trackers \o/$
Boating Tides & Fishing GPS (3.7@53) Ǥ 10
Marine Navigation Lite (3.6@1,804) Ǥ 13 LastUpdate: 2017-12-28 / Marine Navigation (3.5@345; ~EUR 12.00) Ǥ 12 LastUpdate: 2017-11-01
i-Boating:Denmark Marine Maps (3.3@12; ~EUR 65.00) Ǥ 11 $Contains no known trackers \o/$ LastUpdate: 2016-07-09 many more maps etc. from this dev, see this list
Seapilot (3.1@554) Ǥ 13
SeaMapDroid (0@0) 5 Github

Boat log books

2019-10-21

LD-Log FREE - GPS Logger & Travel Diary (4.2@174) 6 $Contains no known trackers \o/$ / LD-Log - GPS Tracker & Logbook (4.8@449; ~EUR 9.00) Ǥ 7 track, waypoints (auto/manual), and more
BoatBook Sailing Log (4@888) Ǥ 17
Sailtracker (4@208) Ǥ 20 LastUpdate: 2017-11-20
Mad Mutt Marine GPS Navigator (4@87) 4 $Contains no known trackers \o/$ LastUpdate: 2014-09-05 Waypoints, logs, anchor alarm
Sailor´s Log Book (4@47) Ǥ 19
nke Display (3.8@23) 5
Boating Diary (3.2@10) 2 $Contains no known trackers \o/$ LastUpdate: 2016-03-29
MarineLoggerPlus (0@0; ~EUR 3.25) Ǥ 15

Anchor Alarms

2019-10-04

Anchor Watch / Alarm (4.5@862) Ǥ 7 / Anchor Watch Pro / Alarm (4.6@303; ~EUR 4.75) Ǥ 7
My Anchor Watch (4.5@117) 7
Sailsafe. Anchor alarm. (4.4@174) 8 $Contains no known trackers \o/$ / Sailsafe Pro. Anchor alarm. (4.4@73; ~EUR 5.00) Ǥ 9
Anchor Alarm - SailGrib AA (4.3@72) Ǥ 11
Anchor Alert (4.2@41; ~EUR 14.00) Ǥ 8
Anchor watch / Geofence (4.2@6) 7 $Contains no known trackers \o/$ LastUpdate: 2014-10-18
Anchor watch (3.9@106) 3 $Contains no known trackers \o/$ LastUpdate: 2018-03-25
Anchor Watch (free) (3.7@57) 9 / Anchor Watch (4.1@20; ~EUR 3.00) 9

Regatta & Races

2019-10-21

Sailing Tack-Tastic (4.6@8) 3 $Contains no known trackers \o/$ LastUpdate: 2016-02-01
Sailware (Sailboat Racing) (4.5@11) Ǥ 10
The Fast Track GPS Tool (4.4@895) Ǥ 11 $Contains no known trackers \o/$ LastUpdate: 2016-08-26
Race Sailing Tack Optimizer Free Edition (4.3@25) 3 LastUpdate: 2017-02-03 / Race Sailing Tack Optimizer Pro Edition (4.5@4; ~EUR 1.50) 3 $Contains no known trackers \o/$ LastUpdate: 2017-11-22
Sail Racer (4.1@225) Ǥ 14
Regatta basic & start timer (3.9@66) 5 LastUpdate: 2017-03-01

Wind, Weather, & Tide

2019-10-21

Windy.app: wind forecast & marine weather (4.5@52,464) Ǥ 19
Windfinder - weather & wind forecast (4.5@20,917) Ǥ 10 / Windfinder Pro - weather & wind forecast (4.4@5,041; ~EUR 7.00) Ǥ 9 Wind, waves, weather & tides worldwide
My Tide Times - Tide Tables, Forecasts & Tides! (4.5@8,964) Ǥ 15 / My Tide Times Pro - Tables, Forecasts & Charts! (4.5@574; ~EUR 2.00) Ǥ 8
Wisuki (4.5@4,911) Ǥ 13 Vorstellung 5/2014
SailGrib Weather Routing Free (4.5@1,444) Ǥ 17 / Weather - Routing - Navigation (4.8@945; ~EUR 70.00) Ǥ 16
Tide Prediction (4.4@2,222) 3 $Contains no known trackers \o/$ LastUpdate: 2013-11-07
Météo Marine (4.3@14,455) Ǥ 11 coastal forecast for France and Europe
SailFlow: Windy Conditions & Forecasts (4.1@580) Ǥ 11
Marine Wind Calculator (4.1@129) 0 $Contains no known trackers \o/$ LastUpdate: 2017-08-21
Tidal Chronoscope (3.8@424) Ǥ 5 $Contains no known trackers \o/$ LastUpdate: 2016-12-16 / Tide: Tidal Chronoscope (3.3@95; ~EUR 2.25) Ǥ 11 LastUpdate: 2016-12-09

Preparation & tests for boat licenses

2019-10-04

SBF Trainer Binnen Free (5@1) 2 LastUpdate: 2017-08-22 / SBF Trainer See Free (4.2@5) 2
SBF Binnen (5@1) Ǥ 5 / SBF See (4@2) Ǥ 5
SBF Binnen 2019 (4.9@2,378) Ǥ 2 $Contains no known trackers \o/$ / SBF See 2019 (4.9@1,976) 1 $Contains no known trackers \o/$ / SBF See 2019 Vollversion (4.8@547; ~EUR 9.00) 1 / SBF Binnen 2019 Vollversion (4.9@405; ~EUR 9.00) 1
Bootstheorie SBF Binnen (Motorboot & Segelschein) (4.8@17; ~EUR 6.50) Ǥ 5 $Contains no known trackers \o/$ LastUpdate: 2017-09-06 / Bootstheorie SBF See (Motorboot & Segelboot) (4.6@18; ~EUR 6.50) Ǥ 5 LastUpdate: 2017-09-06
SBF-Binnen 2019 (4.8@14) Ǥ 5
SKS Sportküstenschifferschein Trainer Free (4.7@13) 2
SBF SKS Sportbootführerschein (4.6@66; ~EUR 0.75) 1 LastUpdate: 2015-01-05
SBF-Fragen | See, Binnen, Funk (4.4@343) Ǥ 6
SBF-Teacher (4.2@91) 0 $Contains no known trackers \o/$ LastUpdate: 2015-01-19
Wassersport einfach lernen (4.2@12) 6 $Contains no known trackers \o/$
Bodenseeschifferpatent-Trainer (4.1@69; ~EUR 5.00) Ǥ 3
SBF See Trainer 2018 (4@5; ~EUR 4.00) 2 $Contains no known trackers \o/$ LastUpdate: 2013-12-18 / SBF Binnen Trainer 2018 (4.4@5; ~EUR 4.00) 2 $Contains no known trackers \o/$ LastUpdate: 2014-01-07
SBF Binnen & See 2019 (3.7@19; ~EUR 4.75) 0 $Contains no known trackers \o/$ LastUpdate: 2016-09-12
Bootsscheine (1@1) Ǥ 9 $Contains no known trackers \o/$

Maritime reference books & manuals

2019-10-04

Mariners´ Glossary (4.8@89) 4
Vessel Lights (4.7@1,704) 0 $Contains no known trackers \o/$
Animated Knots by Grog (4.7@1,204; ~EUR 5.50) 3
Sea Sector - Sailor Personal Maritime Guide (4.7@763) Ǥ 7
Skipper Directory (4.7@333) Ǥ 4 LastUpdate: 2016-01-11
Useful Knots - Tying Guide (4.6@5,365) 3
Maritime Dictionary (4.6@461) Ǥ 4
Nautical Flags Helper (4.6@173) 3
Seabook (4.5@4,660) 2
Marinus ColRegs Lite (4.5@1,791) Ǥ 7 LastUpdate: 2016-08-22 / Marinus - Boating rules (4.6@472; ~EUR 10.00) Ǥ 7 LastUpdate: 2016-08-22
cMate (ColReg, IALA, ICS, SOLAS, LSA, IMO symbols) (4.5@374) 5 $Contains no known trackers \o/$
Nautical Flags (4.5@313) 2 LastUpdate: 2018-03-09
Sea knot (4.4@1,715) Ǥ 6
Future Seafarer (4.4@64) 8 LastUpdate: 2017-10-15
IALA Buoy Trainer (4.4@11; ~EUR 1.25) 0 $Contains no known trackers \o/$
Dictionary of Marine Terms (4.3@2,095) 4 LastUpdate: 2018-03-24
Knots — How to Tie Lite (4.3@473) Ǥ 8 LastUpdate: 2016-08-24
Rules Of the Road (4.2@1,245) 2 LastUpdate: 2015-03-12 Video Overview 2/2012; quick reference of rules, signals, and more
Nautical Dictionary offline (4.2@13) Ǥ 11 LastUpdate: 2018-02-06
Safe Skipper Essential Boating Safety (4@99) 4 LastUpdate: 2017-04-06 / Safe Skipper - Boating Safety (4.3@61) 3 $Contains no known trackers \o/$ LastUpdate: 2016-07-01
ColRegs: Navigation Lights & Shapes (4@63; ~EUR 2.75) 1
SRC Companion Free (3.5@17) 3 / SRC Companion Pro (3.5@4; ~EUR 1.00) 1 $Contains no known trackers \o/$

Other maritime apps

2019-10-21

Nautical Almanac (4.8@670) Ǥ 2 $Contains no known trackers \o/$
Driving license inland 2017 (4.8@647) 0 $Contains no known trackers \o/$ LastUpdate: 2017-09-09 Sportboot-Führerschein für Binnengewässer
SeaHelp (4.8@505) Ǥ 10 breakdown service at sea; Croatia, Slovenia, Northern Italy and the Balearic Islands
iBoatCharter (4.8@92) Ǥ 12 LastUpdate: 2016-04-02 Promo Video 6/2012; Adria
Sentinel - your boat, online (4.7@33) Ǥ 22 advanced control module for your boat
GetMyBoat: Boat Rentals & More (4.5@209) Ǥ 16
Fishing Points: GPS, Tides & Fishing Forecast (4.4@41,787) Ǥ 16
SailDroid (4.4@1,775) 7
Salvamento Marítimo SafeTrx (4.4@94) Ǥ 16 kind of I.C.E. for sailors;
WatchMate (4.3@42) 7
LookMarina- book your berth (4.2@35) Ǥ 10 LastUpdate: 2017-08-31
Boat Calculator (4.1@82) 2 LastUpdate: 2015-05-19 maritime calculator, converter, and more;
Nautical Calculator (4@524) Ǥ 13 / Nautical Calculator Pro (4.7@149; ~EUR 5.50) Ǥ 11
Mast Tuner (4@7) 3 LastUpdate: 2010-08-10 Sail away...
FleetMon Explorer (3.9@1,608) 3 $Contains no known trackers \o/$ LastUpdate: 2014-02-14
easyAIS (3.7@181) 3 $Contains no known trackers \o/$ LastUpdate: 2014-03-11
Mooringo (3.6@40) Ǥ 9
Boating Trip Planner (3.6@12; ~EUR 1.00) Ǥ 4 $Contains no known trackers \o/$ LastUpdate: 2016-02-15
Wind Speed (3.3@530) Ǥ 9 converter: Beaufort, km/h, mph, kn, m/s, ft/s
Ships - Receive AIS data from air (3.1@73) Ǥ 9 Github
canua - für alle Paddler (3.1@51) 10 $Contains no known trackers \o/$ Vorstellung 4/2019 | 5/2019

Further Readings:

Rubrik Navigation
Skipperguide Wiki: Liste nautischer Software
OpenSeaMap - die freie Seekarte
Best Sailing and Boating Apps (7/2018)
Segel-Apps für Ihr Mobiltelefon, Smartphone und Tablet (8/2013)

2019-10-21

IzzyOnDroid

Maritime Navigation

Boat log books

Anchor Alarms

Regatta & Races

Wind, Weather, & Tide

Preparation & tests for boat licenses

Maritime reference books & manuals

Other maritime apps