iSolitaire is a native version of Klondike Solitaire (same as XP Solitaire game) for the iPhone.

It’s in its early stages but the current features are:
– plays Klondike version of Solitaire
– double tap table for options screen where you can deal new cards, change the draw number (1 or 3) or show time/score
– nice surprise once you win (hint: see iSnake or Bounce for an idea what might happen)
– theme support. Add your own theme and easily switch via options screen. Included are default and leopard (thanks to sunsurfin) themes. I’m also looking for a real cool theme that changes the cards as well to be included in the core package

http://iphone.rustyredwagon.com/

Robota Softwarehouse presents a basic but free guitar tuner application for the iPhone.

Release notes:

If enough donations come in (the iPhone community doesn’t seem to be very generous) and people are interested we will add frequency analysis and maybe a metronome.

http://www.robota.nl/products/iPhone%20GuitarTuner.html

SMSD is a simple application for iPhone to delete and forward individual SMS.

SMSD is a simple application for iPhone to delete and forward individual SMS.

http://code.google.com/p/iphone-smsd/

iPhysics is a physics engine for iPhone.

http://www.iphone.r4m0n.net/?p=17

iToggle is a spinoff the Services application. The author added additional controls (Phone, Socks server, Tinyproxy and Auto-lock) and changed the handling of EDGE ON/OFF.

http://web.newsguy.com/marcio/iphone/itoggle/

Enables you to delete individual sms and call entries. It also gives you an option to save your sms messages to your notepad.

http://www.weiphone.com/attachment.php?aid=27260

You can use this application for your own research, for example to figure out a movement when programming a game. Log how smooth your car drives, etc, etc.

The functionality of the free version is limited to viewing the graphs and changing the sample speed. The full version can be ordered for 199 euro.

http://www.robota.nl/products/iPhone%20AcceleroLog.html

iCosta is a “System Level Chinese Input Method” for the iPhone.

Changes:

1. Resolved the problem of iCosta 1.0.0 for firmware 1.1.1 slowing down application launching.
2. As limit of system design, we cannot add a Chinese keyboard in the list in system settings without slowing down the launching.

http://iphone.freecoder.org/

MACalc is a native RPN calculator for iPhone.

Changes:

0.0.5 – LastX was not being saved in some cases

http://web.newsguy.com/marcio/iphone/macalc/