There are four mods I've tried. Truss and Redstone In Motion crash a lot because they try and do rendering. Of the two, Truss is less crashy. Which is too bad, because RiM is actually a really awesome mod that actually advances the concept of frames.
Complex Machines adds frames, but don't use them. Every time I've tried I've corrupted a world.
MFFS3, Calclavia's mod, has the best frame equivalent right now. It's
incredibly good, it lets you move whole volumes of space with forcefield inchworm drives. It requires a lot of power, but I've successfully moved online nuclear reactors (both AtSci and IC2) powering the manipulators. I've also moved buildcraft tanks, and with some careful design you can even move animal farms (I used MFR conveyors to make this work, btw).
If you want frames in 1.5/1.6, the most reliable and useful mod to do it is MFFS3 as far as I can tell. Redstone In Motion is very promising, but the author is obsessed with fancy rendering for every block and this is just... not going to happen. Too many blocks have custom rendering code and you can't crash every time someone has an unusual implicit multiblock or .obj. RiM also has the downside that once you're on it you get locked in place and it can be insanely hard to stop the machine without relogging. Just a very poor design decision.[DOUBLEPOST=1374245237][/DOUBLEPOST]
Oh look, another frame mod.
There are, um... four? And until recently no one has had a stable solution.