RetroGuard
RetroGuard, a general purpose Java obfuscator, is designed to fit effortlessly into your regular build and testing process, providing peace of mind that your valuable Java bytecode is more secure against decompilation and reverse engineering. RetroGuard bytecode obfuscation modifies the contents... The RetroGuard Java bytecode obfuscator is distributed under dual licensing: if you are non-commercial, use RetroGuard under the GNU General Public License; if you are commercial, purchase RetroGuard under an annual license and support agreement.
http://retrologic.com/retroguard-download.html - 168Kb - Download

MIDlet Pascal
Use your Pascal programming skills to develop fully functional Java games and applications for your mobile phone. Midlet Pascal compiles Pascal functions and objects directly into Java bytecode which can be used on any Java supported mobile phone. Some of features: * enerates low-level, small...
http://www.midletpascal.com/download/MPInstall201.exe - 2Mb - Download - Screenshot

ByteRun Protector for PHP
Protect your PHP scripts from being pirated. Convert your PHP scripts to unreadable but still executable form.
http://www.byterun.com/phppro.zip - 3Mb - Download - Screenshot

Pawn
An embedded scripting language, specifically designed to extend applications. Features include a small footprint, inherent support for automatons or "state machines", quick execution of the P-code and a good interface to "native" functions. These features make Pawn a good scripting language for... Optimized P-code ("bytecode") interpreter in assembler (Windows & Linux); there is even a JIT for Windows and Linux. ... Full source code is included. ... Pawn was formerly called the "Small" language.
http://www.compuphase.com/pawn/pawn-3.1.3541.exe - 6Mb - Download - Screenshot

Vistascript Developer
Vistascript is a scripting development environment and runtime for WinFx. The developer includes a syntax highlighting editor, winform designer, class and file browsers, interactive debugger, compiler and ftp based editor support for remote scripts. The runtime interpreter supports XMPP, JSON,... The Vistascript runtime is a bytecode interpreter which can dynamically load Winforms stored in XML format or WPF controls stored in XAML format. ... Callbacks are dynamically assigned after controls have been loaded.
http://vistascript.net/vistascript/data/dowdem/vsdem01.zip - 820Kb - Download - Screenshot

SourceGuardian PHP Encoder
SourceGuardian for PHP is the ultimate protection solution for your PHP scripts. Main feature list: + Full Bytecode Encryption - protect your files by removing the original PHP Source Code + Fully encode and deploy for PHP5 (and PHP4) + Choice of Windows/Linux/Mac OS X encoding clients +...
http://www.sourceguardian.com/demo/sg5demo.zip - 3Mb - Download - Screenshot

DJ Java Decompiler
DJ Java Decompiler is Windows 95/98/Me/NT/2000/XP/2003 decompiler and disassembler for Java that reconstructs the original source code from the compiled binary CLASS files (for example Java applets). DJ Java Decompiler is able to decompile complex Java applets and binaries, producing accurate... DJ Java Decompiler is suitable for studying JAVA bytecode. ... You don't need to have the Java Virtual Machine or any other Java SDK installed. ... You can decompile or disassembler a CLASS files on your computer hard disk or on a network drive that you have a connection to.
http://www.edistribgo.com/djdec39.zip - 4Mb - Download - Screenshot

Janino
Janino is a compiler that reads a Java expression, block, or source file, and generates Java bytecode that is loaded and executed directly. It is not intended to be a development tool, but an embedded compiler for run-time compilation purposes, such as expression evaluators or "server pages"... Because this is so unflexible, the shipping cost expression should be specified at run-time, not at compile-time. ... If the merchant's model changes later, you must change your code, re-compile and re-distribute your software.
http://www.janino.net/download/janino-2.4.3-src.zip - 105Kb - Download

Quexal
MMX/SSE instructions can greatly enhance the performance of the following applications: multimedia (audio/video), communications, DSP kernels, 2D and 3D graphics, image processing and speech recognition. But current compilers do not support these instructions. ... you can use MMX and iSSE instructions even if your compiler does not support them, as the bytecode compiler turns source instructions directly into machine language; Quexal supports the Microsoft Visual C++, Borland C++ Builder and Borland Delphi compilers; - bug killer!
http://www.tommesani.com/Download/QuexalDemo174.exe - 2Mb - Download - Screenshot