I released on GitHub (ie. open source) all the stuff I usually have when I make a Ludum Dare jam:

• my games base-code: https://github.com/deepnight/gameBase
• my libs: https://github.com/deepnight/deepnightLibs
• a simple Tiled importer for Heaps: https://github.com/deepnight/heapsTiled
• a simple Ogmo 3 importer for Heaps: https://github.com/deepnight/heapsOgmo

Feel free to use these for your own projects :)