C Libraries

These are some of the C libraries that I use and I recommend:

• GTK+ my preferred open source GUI widget toolkit (used in the GNOME desktop)
  
• SQLite best embeddable SQL database (take a look at File Locking And Concurrency In SQLite Version 3 so you can be sure that your data is safe with SQLite) (It is used in products like Mozilla Firefox, Google Android, iPhone and new Symbian based phones)