Artha is a handy thesaurus based on WordNet with distinct features like global hot key look up, passive desktop notification, regular expression based search, etc. Artha may be used as a free open-source replacement/clone to the proprietary WordWeb Pro thesaurus (which is also based on WordNet) on Unix-like and Windows operating systems.
FlashCardPrinter is a lean framework for printing flash cards. Flash cards help you learn your vocabulary or similar things that can be described in a few words. Flash cards are typically used in a flash card box according to the Leitner System. Each of the cards contains a question on the front side and the answer on the back side. You check the knowledge of each cards several times with increasing time between.
jVLT is a vocabulary learning tool. Examples containing one or many of the vocabulary words may be specified. jVLT also can perform quizzes, querying only those words which you frequently did not know in the past or which have not been queried for a long time. During a quiz, jVLT shows the examples of each word, letting you better memorize its usage.
Vocatra is a console-based vocabulary trainer. It takes one or more vocabulary files, queries you for each word, and lets you try to give the correct answer. You can enable different learning modes. If you prefer to learn sequentially it has an order mode. Otherwise, there is also a random mode available.
Dr. Higgins will teach you and help you teach yourself any language. It works like a quiz, asking you the translations of words and keeping score of your correctness. It includes a number of quizzes for self-study in different languages (English, Spanish, Finnish, and a bit of Japanese). It's very easy to add your own lists, thanks to a simple file format.
SLD Calculator is a GUI to calculate the characteristics of chemical compounds, especially the Neutron and X-Ray scattering length densities that are often required to know in scattering experiments. Furthermore, it offers internationalization support and is capable of switching the language at runtime.