Download Luscinia from the project download page. If you are on a Mac, there is a an application bundle installer. Otherwise, download the .jar file.

Technology that Luscinia uses:

Luscinia is written in the java programming language. It uses either the MySQL or H2 database engines. To carry out matrix mathematics, it uses Colt. To save files in .xls spreadsheet format, it uses POI.
Each of these projects are made available as Free/Open Source software. As such, they each have their own licenses, which I am obliged to make available to you. Please see the licenses page for these details.

Some Related F/OSS software that you might also consider using (I'm sure I've missed a bunch!):

Audacity is a simple "Swiss Army Knife" sound editor - not especially oriented towards bioacoustics. Does what you want it to without a fuss (works on all common platforms).

Praat is also pretty inspirational software: it is designed for and mostly used by a large community of linguists/phoneticians, but is increasingly popular, with good reason, among biologists studying communication in non-humans too. Carries out a number of advanced linguistic-oriented analyses, but probably the most interesting aspect of it is its scripting ability, and the fact that people really use this feature a lot (also works on all common platforms).

Sound Analysis Pro is a fantastic piece of software if you run Windows, and especially if you work in the laboratory. It has a suite of features that overlaps those of Luscinia, and also has automated recording and operant conditioning control features.

Syrinx also unfortunately only for Windows users is a very useful program that is especially popular for scientists generating playback stimuli. Also has recording capabilities.

Useful bioacoustics sites: Sound Libraries

Xeno-Canto is a popular online repository of bird species, with a focus on the neotropics. You can download songs, look at distribution maps, and even try and identify species based on simple characteristics of the song.

Cornell Lab of Ornithology and its Macaulay Library host a large database of bird songs from around the world as well as producing its own analysis software (e.g. Raven).

The Wildlife Sounds section of the British Library is another very large library of animal recordings. The website also provides some useful information about sound recording.

The Borror Laboratory has another large collection of especially bird recordings that are now digitized. More recording tips can be found there!

The Tierstimmen archive at Berlin also has a very large collection of recordings